2131212230220 has 96 divisors (see below), whose sum is σ = 6160566214656. Its totient is φ = 549929952000.

The previous prime is 2131212230207. The next prime is 2131212230221. The reversal of 2131212230220 is 220322121312.

It is not an unprimeable number, because it can be changed into a prime (2131212230221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18357997 + ... + 18473723.

It is an arithmetic number, because the mean of its divisors is an integer number (64172564736).

Almost surely, 2^{2131212230220} is an apocalyptic number.

2131212230220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2131212230220 is an abundant number, since it is smaller than the sum of its proper divisors (4029353984436).

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

2131212230220 is a wasteful number, since it uses less digits than its factorization.

2131212230220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125671 (or 125669 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 2131212230220 its reverse (220322121312), we get a palindrome (2351534351532).

The spelling of 2131212230220 in words is "two trillion, one hundred thirty-one billion, two hundred twelve million, two hundred thirty thousand, two hundred twenty".