121917047952 has 80 divisors (see below), whose sum is σ = 381118856832. Its totient is φ = 32784414720.

The previous prime is 121917047939. The next prime is 121917047953. The reversal of 121917047952 is 259740719121.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (121917047953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10666299 + ... + 10677722.

Almost surely, 2^121917047952 is an apocalyptic number.

121917047952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121917047952 is an abundant number, since it is smaller than the sum of its proper divisors (259201808880).

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

121917047952 is a wasteful number, since it uses less digits than its factorization.

121917047952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21344056 (or 21344050 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 48.

The spelling of 121917047952 in words is "one hundred twenty-one billion, nine hundred seventeen million, forty-seven thousand, nine hundred fifty-two".