121288972 has 12 divisors (see below), whose sum is σ = 242578000. Its totient is φ = 51980976.

The previous prime is 121288967. The next prime is 121289023. The reversal of 121288972 is 279882121.

121288972 is an admirable number.

It is a super-2 number, since 2×121288972² = 29422029457633568, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2165847 + ... + 2165902.

Almost surely, 2^121288972 is an apocalyptic number.

It is an amenable number.

121288972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121288972 is a wasteful number, since it uses less digits than its factorization.

121288972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331760 (or 4331758 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 121288972 is about 11013.1272579590. The cubic root of 121288972 is about 495.0021725579.

The spelling of 121288972 in words is "one hundred twenty-one million, two hundred eighty-eight thousand, nine hundred seventy-two".