131313220131 has 16 divisors (see below), whose sum is σ = 182536333056. Its totient is φ = 83892952416.

The previous prime is 131313220127. The next prime is 131313220151. The reversal of 131313220131 is 131022313131.

It is a happy number.

It is not a de Polignac number, because 131313220131 - 2² = 131313220127 is a prime.

It is a super-2 number, since 2×131313220131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 131313220098 and 131313220107.

It is not an unprimeable number, because it can be changed into a prime (131313220151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9596295 + ... + 9609968.

It is an arithmetic number, because the mean of its divisors is an integer number (11408520816).

Almost surely, 2^131313220131 is an apocalyptic number.

131313220131 is a deficient number, since it is larger than the sum of its proper divisors (51223112925).

131313220131 is a wasteful number, since it uses less digits than its factorization.

131313220131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19206362.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 131313220131 its reverse (131022313131), we get a palindrome (262335533262).

The spelling of 131313220131 in words is "one hundred thirty-one billion, three hundred thirteen million, two hundred twenty thousand, one hundred thirty-one".