2131022331220 has 24 divisors (see below), whose sum is σ = 4584296821608. Its totient is φ = 831618470400.

The previous prime is 2131022331211. The next prime is 2131022331241. The reversal of 2131022331220 is 221332201312.

It can be written as a sum of positive squares in 4 ways, for example, as 30372124176 + 2100650207044 = 174276^2 + 1449362^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2131022331191 and 2131022331200.

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, 1299403041 + ... + 1299404680.

It is an arithmetic number, because the mean of its divisors is an integer number (191012367567).

Almost surely, 2^{2131022331220} is an apocalyptic number.

2131022331220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131022331220 is an abundant number, since it is smaller than the sum of its proper divisors (2453274490388).

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

2131022331220 is a wasteful number, since it uses less digits than its factorization.

2131022331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2598807771 (or 2598807769 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 2131022331220 its reverse (221332201312), we get a palindrome (2352354532532).

The spelling of 2131022331220 in words is "two trillion, one hundred thirty-one billion, twenty-two million, three hundred thirty-one thousand, two hundred twenty".