311132012231 has 4 divisors (see below), whose sum is σ = 311540859264. Its totient is φ = 310723165200.

The previous prime is 311132012221. The next prime is 311132012281. The reversal of 311132012231 is 132210231113.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132210231113 = 118549 ⋅1115237.

It is a cyclic number.

It is not a de Polignac number, because 311132012231 - 2²⁶ = 311064903367 is a prime.

It is a super-2 number, since 2×311132012231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311132012201) 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, 204422375 + ... + 204423896.

It is an arithmetic number, because the mean of its divisors is an integer number (77885214816).

Almost surely, 2^311132012231 is an apocalyptic number.

311132012231 is a deficient number, since it is larger than the sum of its proper divisors (408847033).

311132012231 is an equidigital number, since it uses as much as digits as its factorization.

311132012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408847032.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 311132012231 its reverse (132210231113), we get a palindrome (443342243344).

The spelling of 311132012231 in words is "three hundred eleven billion, one hundred thirty-two million, twelve thousand, two hundred thirty-one".