131021122131 has 8 divisors (see below), whose sum is σ = 194105366160. Its totient is φ = 87347414736.

The previous prime is 131021122073. The next prime is 131021122147. The reversal of 131021122131 is 131221120131.

It is not a de Polignac number, because 131021122131 - 2⁷ = 131021122003 is a prime.

It is a super-2 number, since 2×131021122131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131021122151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2426317050 + ... + 2426317103.

It is an arithmetic number, because the mean of its divisors is an integer number (24263170770).

Almost surely, 2^131021122131 is an apocalyptic number.

131021122131 is a deficient number, since it is larger than the sum of its proper divisors (63084244029).

131021122131 is an equidigital number, since it uses as much as digits as its factorization.

131021122131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4852634162 (or 4852634156 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 131021122131 its reverse (131221120131), we get a palindrome (262242242262).

The spelling of 131021122131 in words is "one hundred thirty-one billion, twenty-one million, one hundred twenty-two thousand, one hundred thirty-one".