123311011311 has 16 divisors (see below), whose sum is σ = 182789197920. Its totient is φ = 82159542720.

The previous prime is 123311011303. The next prime is 123311011321. The reversal of 123311011311 is 113110113321.

123311011311 is a `hidden beast` number, since 1 + 2 + 331 + 10 + 11 + 311 = 666.

It is not a de Polignac number, because 123311011311 - 2³ = 123311011303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311011321) 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, 1280400 + ... + 1373333.

It is an arithmetic number, because the mean of its divisors is an integer number (11424324870).

Almost surely, 2^123311011311 is an apocalyptic number.

123311011311 is a deficient number, since it is larger than the sum of its proper divisors (59478186609).

123311011311 is a wasteful number, since it uses less digits than its factorization.

123311011311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2655463 (or 2655457 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

Adding to 123311011311 its reverse (113110113321), we get a palindrome (236421124632).

It can be divided in two parts, 1233110 and 11311, that added together give a palindrome (1244421).

The spelling of 123311011311 in words is "one hundred twenty-three billion, three hundred eleven million, eleven thousand, three hundred eleven".