121940376512 has 42 divisors (see below), whose sum is σ = 247162667472. Its totient is φ = 59663577984.

The previous prime is 121940376479. The next prime is 121940376527. The reversal of 121940376512 is 215673049121.

It is a super-2 number, since 2×121940376512² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121940376512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19148753 + ... + 19155119.

It is an arithmetic number, because the mean of its divisors is an integer number (5884825416).

Almost surely, 2^121940376512 is an apocalyptic number.

It is an amenable number.

121940376512 is an abundant number, since it is smaller than the sum of its proper divisors (125222290960).

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

121940376512 is an frugal number, since it uses more digits than its factorization.

121940376512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12793 (or 6416 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 121940376512 in words is "one hundred twenty-one billion, nine hundred forty million, three hundred seventy-six thousand, five hundred twelve".