Search a number
-
+
221221204011 = 32131187634609
BaseRepresentation
bin1100111000000111001…
…1111011000000101011
3210011000021201112201100
43032001303323000223
512111030112012021
6245343322052443
721661032131313
oct3160163730053
9704007645640
10221221204011
1185901669935
1236a5a64a123
1317b26a03722
14a9c8656443
155b4b518626
hex3381cfb02b

221221204011 has 12 divisors (see below), whose sum is σ = 321980990760. Its totient is φ = 146354994240.

The previous prime is 221221203979. The next prime is 221221204021. The reversal of 221221204011 is 110402122122.

221221204011 is a `hidden beast` number, since 2 + 21 + 221 + 20 + 401 + 1 = 666.

221221204011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221221204011 - 25 = 221221203979 is a prime.

It is a super-2 number, since 2×2212212040112 (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221221204021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93816126 + ... + 93818483.

It is an arithmetic number, because the mean of its divisors is an integer number (26831749230).

Almost surely, 2221221204011 is an apocalyptic number.

221221204011 is a deficient number, since it is larger than the sum of its proper divisors (100759786749).

221221204011 is a wasteful number, since it uses less digits than its factorization.

221221204011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187634746 (or 187634743 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221221204011 its reverse (110402122122), we get a palindrome (331623326133).

The spelling of 221221204011 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred four thousand, eleven".

Divisors: 1 3 9 131 393 1179 187634609 562903827 1688711481 24580133779 73740401337 221221204011