311120233231 has 4 divisors (see below), whose sum is σ = 311312403000. Its totient is φ = 310928063464.

The previous prime is 311120233183. The next prime is 311120233321. The reversal of 311120233231 is 132332021113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132332021113 = 4289 ⋅30853817.

It is a cyclic number.

It is not a de Polignac number, because 311120233231 - 2⁷ = 311120233103 is a prime.

It is a super-2 number, since 2×311120233231² (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 (311120233531) 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, 96082456 + ... + 96085693.

It is an arithmetic number, because the mean of its divisors is an integer number (77828100750).

Almost surely, 2^311120233231 is an apocalyptic number.

311120233231 is a deficient number, since it is larger than the sum of its proper divisors (192169769).

311120233231 is a wasteful number, since it uses less digits than its factorization.

311120233231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192169768.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 311120233231 its reverse (132332021113), we get a palindrome (443452254344).

The spelling of 311120233231 in words is "three hundred eleven billion, one hundred twenty million, two hundred thirty-three thousand, two hundred thirty-one".