121321103256 has 96 divisors (see below), whose sum is σ = 357028838400. Its totient is φ = 37076045760.

The previous prime is 121321103221. The next prime is 121321103257. The reversal of 121321103256 is 652301123121.

121321103256 is a `hidden beast` number, since 1 + 2 + 1 + 321 + 10 + 325 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321103257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1387996 + ... + 1472811.

It is an arithmetic number, because the mean of its divisors is an integer number (3719050400).

Almost surely, 2^121321103256 is an apocalyptic number.

It is an amenable number.

121321103256 is an abundant number, since it is smaller than the sum of its proper divisors (235707735144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121321103256 is a wasteful number, since it uses less digits than its factorization.

121321103256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860869 (or 2860862 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 121321103256 its reverse (652301123121), we get a palindrome (773622226377).

The spelling of 121321103256 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred three thousand, two hundred fifty-six".