121965518392 has 32 divisors (see below), whose sum is σ = 229394246400. Its totient is φ = 60793858944.

The previous prime is 121965518377. The next prime is 121965518417. The reversal of 121965518392 is 293815569121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8583838 + ... + 8598034.

It is an arithmetic number, because the mean of its divisors is an integer number (7168570200).

Almost surely, 2^121965518392 is an apocalyptic number.

It is an amenable number.

121965518392 is a deficient number, since it is larger than the sum of its proper divisors (107428728008).

121965518392 is a wasteful number, since it uses less digits than its factorization.

121965518392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17455 (or 17451 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 52.

The spelling of 121965518392 in words is "one hundred twenty-one billion, nine hundred sixty-five million, five hundred eighteen thousand, three hundred ninety-two".