31013221303131 has 8 divisors (see below), whose sum is σ = 42131168562960. Its totient is φ = 20285377456032.

The previous prime is 31013221303073. The next prime is 31013221303157. The reversal of 31013221303131 is 13130312231013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-31013221303131 is a prime.

It is a super-2 number, since 2×31013221303131² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31013221303931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97525852996 + ... + 97525853313.

It is an arithmetic number, because the mean of its divisors is an integer number (5266396070370).

Almost surely, 2^{31013221303131} is an apocalyptic number.

31013221303131 is a deficient number, since it is larger than the sum of its proper divisors (11117947259829).

31013221303131 is a wasteful number, since it uses less digits than its factorization.

31013221303131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195051706365.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 31013221303131 its reverse (13130312231013), we get a palindrome (44143533534144).

The spelling of 31013221303131 in words is "thirty-one trillion, thirteen billion, two hundred twenty-one million, three hundred three thousand, one hundred thirty-one".