31201012113131 has 4 divisors (see below), whose sum is σ = 35658299557872. Its totient is φ = 26743724668392.

The previous prime is 31201012113113. The next prime is 31201012113157. The reversal of 31201012113131 is 13131121010213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31201012113131 is a prime.

It is a super-2 number, since 2×31201012113131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31201012113181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2228643722360 + ... + 2228643722373.

It is an arithmetic number, because the mean of its divisors is an integer number (8914574889468).

Almost surely, 2^{31201012113131} is an apocalyptic number.

31201012113131 is a deficient number, since it is larger than the sum of its proper divisors (4457287444741).

31201012113131 is an equidigital number, since it uses as much as digits as its factorization.

31201012113131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457287444740.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 31201012113131 its reverse (13131121010213), we get a palindrome (44332133123344).

The spelling of 31201012113131 in words is "thirty-one trillion, two hundred one billion, twelve million, one hundred thirteen thousand, one hundred thirty-one".