121346256556 has 24 divisors (see below), whose sum is σ = 245764574720. Its totient is φ = 51347239632.

The previous prime is 121346256529. The next prime is 121346256587. The reversal of 121346256556 is 655652643121.

It is a super-2 number, since 2×121346256556² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27426870 + ... + 27431293.

Almost surely, 2^121346256556 is an apocalyptic number.

It is an amenable number.

121346256556 is an abundant number, since it is smaller than the sum of its proper divisors (124418318164).

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

121346256556 is a wasteful number, since it uses less digits than its factorization.

121346256556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54858253 (or 54858251 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 46.

Adding to 121346256556 its reverse (655652643121), we get a palindrome (776998899677).

The spelling of 121346256556 in words is "one hundred twenty-one billion, three hundred forty-six million, two hundred fifty-six thousand, five hundred fifty-six".