31112202102131 has 2 divisors, whose sum is σ = 31112202102132. Its totient is φ = 31112202102130.

The previous prime is 31112202102109. The next prime is 31112202102151. The reversal of 31112202102131 is 13120120221113.

It is an a-pointer prime, because the next prime (31112202102151) can be obtained adding 31112202102131 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31112202102131 - 2¹⁴ = 31112202085747 is a prime.

It is a super-2 number, since 2×31112202102131² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31112202102101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15556101051065 + 15556101051066.

It is an arithmetic number, because the mean of its divisors is an integer number (15556101051066).

Almost surely, 2^{31112202102131} is an apocalyptic number.

31112202102131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31112202102131 is an equidigital number, since it uses as much as digits as its factorization.

31112202102131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 31112202102131 its reverse (13120120221113), we get a palindrome (44232322323244).

The spelling of 31112202102131 in words is "thirty-one trillion, one hundred twelve billion, two hundred two million, one hundred two thousand, one hundred thirty-one".