121217693604 has 24 divisors (see below), whose sum is σ = 323247183168. Its totient is φ = 34633626720.

The previous prime is 121217693501. The next prime is 121217693617. The reversal of 121217693604 is 406396712121.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 721533807 + ... + 721533974.

It is an arithmetic number, because the mean of its divisors is an integer number (13468632632).

Almost surely, 2^121217693604 is an apocalyptic number.

121217693604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121217693604 is an abundant number, since it is smaller than the sum of its proper divisors (202029489564).

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

121217693604 is a wasteful number, since it uses less digits than its factorization.

121217693604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443067795 (or 1443067793 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 121217693604 in words is "one hundred twenty-one billion, two hundred seventeen million, six hundred ninety-three thousand, six hundred four".