131230221213 has 32 divisors (see below), whose sum is σ = 215544426496. Its totient is φ = 69158536128.

The previous prime is 131230221203. The next prime is 131230221257. The reversal of 131230221213 is 312122032131.

It is not a de Polignac number, because 131230221213 - 2¹³ = 131230213021 is a prime.

It is a super-2 number, since 2×131230221213² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 131230221213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131230221203) 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, 92556 + ... + 520602.

It is an arithmetic number, because the mean of its divisors is an integer number (6735763328).

Almost surely, 2^131230221213 is an apocalyptic number.

131230221213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

131230221213 is a deficient number, since it is larger than the sum of its proper divisors (84314205283).

131230221213 is a wasteful number, since it uses less digits than its factorization.

131230221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429193.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 131230221213 its reverse (312122032131), we get a palindrome (443352253344).

The spelling of 131230221213 in words is "one hundred thirty-one billion, two hundred thirty million, two hundred twenty-one thousand, two hundred thirteen".