131213220042321 has 6 divisors (see below), whose sum is σ = 189530206727810. Its totient is φ = 87475480028208.

The previous prime is 131213220042313. The next prime is 131213220042329. The reversal of 131213220042321 is 123240022312131.

131213220042321 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 1 + 32 + 200 + 423 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (131213220042313) and next prime (131213220042329).

It can be written as a sum of positive squares in only one way, i.e., 116355895611921 + 14857324430400 = 10786839^2 + 3854520^2 .

It is not a de Polignac number, because 131213220042321 - 2³ = 131213220042313 is a prime.

It is a super-2 number, since 2×131213220042321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131213220042329) 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, 7289623335676 + ... + 7289623335693.

Almost surely, 2^{131213220042321} is an apocalyptic number.

It is an amenable number.

131213220042321 is a deficient number, since it is larger than the sum of its proper divisors (58316986685489).

131213220042321 is a wasteful number, since it uses less digits than its factorization.

131213220042321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14579246671375 (or 14579246671372 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

Adding to 131213220042321 its reverse (123240022312131), we get a palindrome (254453242354452).

The spelling of 131213220042321 in words is "one hundred thirty-one trillion, two hundred thirteen billion, two hundred twenty million, forty-two thousand, three hundred twenty-one".