31002120320131 has 2 divisors, whose sum is σ = 31002120320132. Its totient is φ = 31002120320130.

The previous prime is 31002120320057. The next prime is 31002120320159. The reversal of 31002120320131 is 13102302120013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31002120320131 - 2¹⁵ = 31002120287363 is a prime.

It is a super-2 number, since 2×31002120320131² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31002120320099 and 31002120320108.

It is not a weakly prime, because it can be changed into another prime (31002120320531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15501060160065 + 15501060160066.

It is an arithmetic number, because the mean of its divisors is an integer number (15501060160066).

Almost surely, 2^{31002120320131} is an apocalyptic number.

31002120320131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31002120320131 is an equidigital number, since it uses as much as digits as its factorization.

31002120320131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 31002120320131 its reverse (13102302120013), we get a palindrome (44104422440144).

The spelling of 31002120320131 in words is "thirty-one trillion, two billion, one hundred twenty million, three hundred twenty thousand, one hundred thirty-one".