331220132211220 has 96 divisors (see below), whose sum is σ = 803889097804800. Its totient is φ = 112283308892160.

The previous prime is 331220132211211. The next prime is 331220132211233. The reversal of 331220132211220 is 22112231022133.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2619925 + ... + 25870915.

It is an arithmetic number, because the mean of its divisors is an integer number (8373844768800).

Almost surely, 2^{331220132211220} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331220132211220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401944548902400).

331220132211220 is an abundant number, since it is smaller than the sum of its proper divisors (472668965593580).

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

331220132211220 is a wasteful number, since it uses less digits than its factorization.

331220132211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23252153 (or 23252151 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 331220132211220 its reverse (22112231022133), we get a palindrome (353332363233353).

The spelling of 331220132211220 in words is "three hundred thirty-one trillion, two hundred twenty billion, one hundred thirty-two million, two hundred eleven thousand, two hundred twenty".