121840972 has 24 divisors (see below), whose sum is σ = 246289680. Its totient is φ = 52124160.

The previous prime is 121840951. The next prime is 121840987. The reversal of 121840972 is 279048121.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 80697 + ... + 82192.

It is an arithmetic number, because the mean of its divisors is an integer number (10262070).

Almost surely, 2^121840972 is an apocalyptic number.

It is an amenable number.

121840972 is an abundant number, since it is smaller than the sum of its proper divisors (124448708).

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

121840972 is a wasteful number, since it uses less digits than its factorization.

121840972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162921 (or 162919 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 121840972 is about 11038.1598104032. The cubic root of 121840972 is about 495.7519734186.

The spelling of 121840972 in words is "one hundred twenty-one million, eight hundred forty thousand, nine hundred seventy-two".