2131220022131 has 12 divisors (see below), whose sum is σ = 2252387369232. Its totient is φ = 2016273063024.

The previous prime is 2131220022097. The next prime is 2131220022157. The reversal of 2131220022131 is 1312200221312.

It is a de Polignac number, because none of the positive numbers 2^k-2131220022131 is a prime.

It is a super-2 number, since 2×2131220022131² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131220028131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3797840 + ... + 4322733.

It is an arithmetic number, because the mean of its divisors is an integer number (187698947436).

Almost surely, 2^{2131220022131} is an apocalyptic number.

2131220022131 is a deficient number, since it is larger than the sum of its proper divisors (121167347101).

2131220022131 is an equidigital number, since it uses as much as digits as its factorization.

2131220022131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8121338 (or 8121319 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 2131220022131 its reverse (1312200221312), we get a palindrome (3443420243443).

It can be divided in two parts, 2 and 131220022131, that multiplied together give a palindrome (262440044262).

The spelling of 2131220022131 in words is "two trillion, one hundred thirty-one billion, two hundred twenty million, twenty-two thousand, one hundred thirty-one".