231311211132011 has 16 divisors (see below), whose sum is σ = 234793061388288. Its totient is φ = 227835647272800.

The previous prime is 231311211131977. The next prime is 231311211132013. The reversal of 231311211132011 is 110231112113132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231311211132011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231311211132013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 499986581 + ... + 500449001.

It is an arithmetic number, because the mean of its divisors is an integer number (14674566336768).

Almost surely, 2^{231311211132011} is an apocalyptic number.

231311211132011 is a deficient number, since it is larger than the sum of its proper divisors (3481850256277).

231311211132011 is a wasteful number, since it uses less digits than its factorization.

231311211132011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469202.

The product of its (nonzero) digits is 216, while the sum is 23.

Adding to 231311211132011 its reverse (110231112113132), we get a palindrome (341542323245143).

The spelling of 231311211132011 in words is "two hundred thirty-one trillion, three hundred eleven billion, two hundred eleven million, one hundred thirty-two thousand, eleven".