311220031130211 has 24 divisors (see below), whose sum is σ = 482910674932560. Its totient is φ = 177765576391872.

The previous prime is 311220031130171. The next prime is 311220031130213. The reversal of 311220031130211 is 112031130022113.

It is not a de Polignac number, because 311220031130211 - 2¹¹ = 311220031128163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (311220031130213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 442751176 + ... + 443453541.

It is an arithmetic number, because the mean of its divisors is an integer number (20121278122190).

Almost surely, 2^{311220031130211} is an apocalyptic number.

311220031130211 is a deficient number, since it is larger than the sum of its proper divisors (171690643802349).

311220031130211 is a wasteful number, since it uses less digits than its factorization.

311220031130211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886207123 (or 886207116 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 311220031130211 its reverse (112031130022113), we get a palindrome (423251161152324).

The spelling of 311220031130211 in words is "three hundred eleven trillion, two hundred twenty billion, thirty-one million, one hundred thirty thousand, two hundred eleven".