131122212013 has 6 divisors (see below), whose sum is σ = 141984407274. Its totient is φ = 121035887856.

The previous prime is 131122211939. The next prime is 131122212017. The reversal of 131122212013 is 310212221131.

It can be written as a sum of positive squares in 3 ways, for example, as 6737618889 + 124384593124 = 82083^2 + 352682^2 .

It is not a de Polignac number, because 131122212013 - 2¹⁷ = 131122080941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131122212017) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 387935370 + ... + 387935707.

It is an arithmetic number, because the mean of its divisors is an integer number (23664067879).

Almost surely, 2^131122212013 is an apocalyptic number.

131122212013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131122212013 is a deficient number, since it is larger than the sum of its proper divisors (10862195261).

131122212013 is an equidigital number, since it uses as much as digits as its factorization.

131122212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775871103 (or 775871090 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 131122212013 its reverse (310212221131), we get a palindrome (441334433144).

The spelling of 131122212013 in words is "one hundred thirty-one billion, one hundred twenty-two million, two hundred twelve thousand, thirteen".