Search a number
-
+
121222022021 = 541224070281
BaseRepresentation
bin111000011100101100…
…1010100001110000101
3102120220011121202120022
41300321121110032011
53441230314201041
6131404424344525
711520665120552
oct1607131241605
9376804552508
10121222022021
1147456742381
121b5b1015145
13b57b41c419
145c1d769a29
1532473e124b
hex1c39654385

121222022021 has 4 divisors (see below), whose sum is σ = 121446092844. Its totient is φ = 120997951200.

The previous prime is 121222021981. The next prime is 121222022029. The reversal of 121222022021 is 120220222121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 56209771396 + 65012250625 = 237086^2 + 254975^2 .

It is a cyclic number.

It is not a de Polignac number, because 121222022021 - 214 = 121222005637 is a prime.

It is a super-3 number, since 3×1212220220213 (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222022029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112034600 + ... + 112035681.

It is an arithmetic number, because the mean of its divisors is an integer number (30361523211).

Almost surely, 2121222022021 is an apocalyptic number.

It is an amenable number.

121222022021 is a deficient number, since it is larger than the sum of its proper divisors (224070823).

121222022021 is an equidigital number, since it uses as much as digits as its factorization.

121222022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224070822.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 121222022021 its reverse (120220222121), we get a palindrome (241442244142).

The spelling of 121222022021 in words is "one hundred twenty-one billion, two hundred twenty-two million, twenty-two thousand, twenty-one".

Divisors: 1 541 224070281 121222022021