2131220331320 has 32 divisors (see below), whose sum is σ = 4815309556800. Its totient is φ = 848921232768.

The previous prime is 2131220331319. The next prime is 2131220331341. The reversal of 2131220331320 is 231330221312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111455939 + ... + 111475058.

It is an arithmetic number, because the mean of its divisors is an integer number (150478423650).

Almost surely, 2^{2131220331320} is an apocalyptic number.

2131220331320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131220331320 is an abundant number, since it is smaller than the sum of its proper divisors (2684089225480).

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

2131220331320 is a wasteful number, since it uses less digits than its factorization.

2131220331320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222931247 (or 222931243 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 2131220331320 its reverse (231330221312), we get a palindrome (2362550552632).

The spelling of 2131220331320 in words is "two trillion, one hundred thirty-one billion, two hundred twenty million, three hundred thirty-one thousand, three hundred twenty".