121585920812 has 24 divisors (see below), whose sum is σ = 216169497600. Its totient is φ = 59825042640.

The previous prime is 121585920803. The next prime is 121585920857. The reversal of 121585920812 is 218029585121.

It is a super-2 number, since 2×121585920812² (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, 36689 + ... + 494487.

It is an arithmetic number, because the mean of its divisors is an integer number (9007062400).

Almost surely, 2^121585920812 is an apocalyptic number.

It is an amenable number.

121585920812 is a deficient number, since it is larger than the sum of its proper divisors (94583576788).

121585920812 is a wasteful number, since it uses less digits than its factorization.

121585920812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458861 (or 458859 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 44.

The spelling of 121585920812 in words is "one hundred twenty-one billion, five hundred eighty-five million, nine hundred twenty thousand, eight hundred twelve".