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121210220122 = 2112135404897
BaseRepresentation
bin111000011100010110…
…0010010111001011010
3102120212100102011101221
41300320230102321122
53441214304020442
6131403323402254
711520462604645
oct1607054227132
9376770364357
10121210220122
1147450011442
121b5a908338a
13b578b49654
145c1bd76a5c
15324635e467
hex1c38b12e5a

121210220122 has 8 divisors (see below), whose sum is σ = 181831578516. Its totient is φ = 60599693952.

The previous prime is 121210220113. The next prime is 121210220123. The reversal of 121210220122 is 221022012121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 92780550801 + 28429669321 = 304599^2 + 168611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 121210220096 and 121210220105.

It is not an unprimeable number, because it can be changed into a prime (121210220123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2680023 + ... + 2724874.

Almost surely, 2121210220122 is an apocalyptic number.

121210220122 is a deficient number, since it is larger than the sum of its proper divisors (60621358394).

121210220122 is a wasteful number, since it uses less digits than its factorization.

121210220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5416112.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121210220122 its reverse (221022012121), we get a palindrome (342232232243).

The spelling of 121210220122 in words is "one hundred twenty-one billion, two hundred ten million, two hundred twenty thousand, one hundred twenty-two".

Divisors: 1 2 11213 22426 5404897 10809794 60605110061 121210220122