123011333131231 has 4 divisors (see below), whose sum is σ = 123011586157000. Its totient is φ = 123011080105464.

The previous prime is 123011333131229. The next prime is 123011333131237. The reversal of 123011333131231 is 132131333110321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123011333131231 - 2¹ = 123011333131229 is a prime.

It is a super-2 number, since 2×123011333131231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123011333131231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011333131237) 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, 125782236 + ... + 126756433.

It is an arithmetic number, because the mean of its divisors is an integer number (30752896539250).

Almost surely, 2^{123011333131231} is an apocalyptic number.

123011333131231 is a deficient number, since it is larger than the sum of its proper divisors (253025769).

123011333131231 is an equidigital number, since it uses as much as digits as its factorization.

123011333131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253025768.

The product of its (nonzero) digits is 2916, while the sum is 28.

Adding to 123011333131231 its reverse (132131333110321), we get a palindrome (255142666241552).

The spelling of 123011333131231 in words is "one hundred twenty-three trillion, eleven billion, three hundred thirty-three million, one hundred thirty-one thousand, two hundred thirty-one".