72131121210 has 32 divisors (see below), whose sum is σ = 183297909312. Its totient is φ = 18103496960.

The previous prime is 72131121197. The next prime is 72131121241. The reversal of 72131121210 is 1212113127.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70716276 + ... + 70717295.

It is an arithmetic number, because the mean of its divisors is an integer number (5728059666).

Almost surely, 2^72131121210 is an apocalyptic number.

72131121210 is an abundant number, since it is smaller than the sum of its proper divisors (111166788102).

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

72131121210 is a wasteful number, since it uses less digits than its factorization.

72131121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141433598.

The product of its (nonzero) digits is 168, while the sum is 21.

Adding to 72131121210 its reverse (1212113127), we get a palindrome (73343234337).

The spelling of 72131121210 in words is "seventy-two billion, one hundred thirty-one million, one hundred twenty-one thousand, two hundred ten".