123231001311 has 48 divisors (see below), whose sum is σ = 199536574848. Its totient is φ = 72628228800.

The previous prime is 123231001303. The next prime is 123231001373. The reversal of 123231001311 is 113100132321.

123231001311 is a `hidden beast` number, since 12 + 32 + 310 + 0 + 1 + 311 = 666.

It is not a de Polignac number, because 123231001311 - 2³ = 123231001303 is a prime.

It is a super-2 number, since 2×123231001311² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123231001391) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7797960 + ... + 7813746.

It is an arithmetic number, because the mean of its divisors is an integer number (4157011976).

Almost surely, 2^123231001311 is an apocalyptic number.

123231001311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123231001311 is a deficient number, since it is larger than the sum of its proper divisors (76305573537).

123231001311 is a wasteful number, since it uses less digits than its factorization.

123231001311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17972 (or 17969 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 123231001311 its reverse (113100132321), we get a palindrome (236331133632).

It can be divided in two parts, 12 and 3231001311, that added together give a palindrome (3231001323).

The spelling of 123231001311 in words is "one hundred twenty-three billion, two hundred thirty-one million, one thousand, three hundred eleven".