21231201233260 has 48 divisors (see below), whose sum is σ = 45123508475136. Its totient is φ = 8390010670272.

The previous prime is 21231201233233. The next prime is 21231201233273. The reversal of 21231201233260 is 6233210213212.

It is a happy number.

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, 156774097 + ... + 156909463.

It is an arithmetic number, because the mean of its divisors is an integer number (940073093232).

Almost surely, 2^{21231201233260} is an apocalyptic number.

21231201233260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21231201233260 is an abundant number, since it is smaller than the sum of its proper divisors (23892307241876).

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

21231201233260 is a wasteful number, since it uses less digits than its factorization.

21231201233260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229942 (or 229940 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 21231201233260 its reverse (6233210213212), we get a palindrome (27464411446472).

The spelling of 21231201233260 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred one million, two hundred thirty-three thousand, two hundred sixty".