31130321210311 has 4 divisors (see below), whose sum is σ = 31151657963800. Its totient is φ = 31108984456824.

The previous prime is 31130321210257. The next prime is 31130321210323. The reversal of 31130321210311 is 11301212303113.

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

It is a cyclic number.

It is not a de Polignac number, because 31130321210311 - 2¹¹ = 31130321208263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130321213311) 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, 10668374556 + ... + 10668377473.

It is an arithmetic number, because the mean of its divisors is an integer number (7787914490950).

Almost surely, 2^{31130321210311} is an apocalyptic number.

31130321210311 is a deficient number, since it is larger than the sum of its proper divisors (21336753489).

31130321210311 is a wasteful number, since it uses less digits than its factorization.

31130321210311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21336753488.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 31130321210311 its reverse (11301212303113), we get a palindrome (42431533513424).

The spelling of 31130321210311 in words is "thirty-one trillion, one hundred thirty billion, three hundred twenty-one million, two hundred ten thousand, three hundred eleven".