33121642272 has 24 divisors (see below), whose sum is σ = 86944311216. Its totient is φ = 11040547392.

The previous prime is 33121642219. The next prime is 33121642303. The reversal of 33121642272 is 27224612133.

It is a tau number, because it is divible by the number of its divisors (24).

It is a hoax number, since the sum of its digits (33) 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, 172508458 + ... + 172508649.

It is an arithmetic number, because the mean of its divisors is an integer number (3622679634).

Almost surely, 2^33121642272 is an apocalyptic number.

33121642272 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

33121642272 is an abundant number, since it is smaller than the sum of its proper divisors (53822668944).

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

33121642272 is a wasteful number, since it uses less digits than its factorization.

33121642272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345017120 (or 345017112 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The spelling of 33121642272 in words is "thirty-three billion, one hundred twenty-one million, six hundred forty-two thousand, two hundred seventy-two".