31311320311011 has 8 divisors (see below), whose sum is σ = 44959844549200. Its totient is φ = 19268504806752.

The previous prime is 31311320310971. The next prime is 31311320311021. The reversal of 31311320311011 is 11011302311313.

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

It is not a de Polignac number, because 31311320311011 - 2¹³ = 31311320302819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31311320311021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401427183436 + ... + 401427183513.

It is an arithmetic number, because the mean of its divisors is an integer number (5619980568650).

Almost surely, 2^{31311320311011} is an apocalyptic number.

31311320311011 is a deficient number, since it is larger than the sum of its proper divisors (13648524238189).

31311320311011 is a wasteful number, since it uses less digits than its factorization.

31311320311011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802854366965.

The product of its (nonzero) digits is 162, while the sum is 21.

Adding to 31311320311011 its reverse (11011302311313), we get a palindrome (42322622622324).

The spelling of 31311320311011 in words is "thirty-one trillion, three hundred eleven billion, three hundred twenty million, three hundred eleven thousand, eleven".