121000000000056 has 32 divisors (see below), whose sum is σ = 302524536387600. Its totient is φ = 40330061815040.

The previous prime is 121000000000007. The next prime is 121000000000057. The reversal of 121000000000056 is 650000000000121.

It is a junction number, because it is equal to n+sod(n) for n = 120999999999954 and 121000000000044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121000000000057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204167835 + ... + 204759626.

Almost surely, 2^{121000000000056} is an apocalyptic number.

It is an amenable number.

121000000000056 is an abundant number, since it is smaller than the sum of its proper divisors (181524536387544).

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

121000000000056 is a wasteful number, since it uses less digits than its factorization.

121000000000056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408939799 (or 408939795 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

Adding to 121000000000056 its reverse (650000000000121), we get a palindrome (771000000000177).

The spelling of 121000000000056 in words is "one hundred twenty-one trillion, fifty-six", and thus it is an aban number.