121055511012 has 24 divisors (see below), whose sum is σ = 285102701856. Its totient is φ = 39974716608.

The previous prime is 121055510993. The next prime is 121055511041. The reversal of 121055511012 is 210115550121.

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, 47138713 + ... + 47141280.

It is an arithmetic number, because the mean of its divisors is an integer number (11879279244).

Almost surely, 2^121055511012 is an apocalyptic number.

121055511012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121055511012 is an abundant number, since it is smaller than the sum of its proper divisors (164047190844).

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

121055511012 is a wasteful number, since it uses less digits than its factorization.

121055511012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94280107 (or 94280105 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 24.

The spelling of 121055511012 in words is "one hundred twenty-one billion, fifty-five million, five hundred eleven thousand, twelve".