131031213031 has 2 divisors, whose sum is σ = 131031213032. Its totient is φ = 131031213030.

The previous prime is 131031213007. The next prime is 131031213107. The reversal of 131031213031 is 130312130131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131031213031 - 2¹¹ = 131031210983 is a prime.

It is a super-2 number, since 2×131031213031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131031213431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65515606515 + 65515606516.

It is an arithmetic number, because the mean of its divisors is an integer number (65515606516).

Almost surely, 2^131031213031 is an apocalyptic number.

131031213031 is a deficient number, since it is larger than the sum of its proper divisors (1).

131031213031 is an equidigital number, since it uses as much as digits as its factorization.

131031213031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 131031213031 its reverse (130312130131), we get a palindrome (261343343162).

The spelling of 131031213031 in words is "one hundred thirty-one billion, thirty-one million, two hundred thirteen thousand, thirty-one".