123131020011231 has 8 divisors (see below), whose sum is σ = 164175213754240. Its totient is φ = 82087086471192.

The previous prime is 123131020011173. The next prime is 123131020011239. The reversal of 123131020011231 is 132110020131321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123131020011231 - 2¹³ = 123131020003039 is a prime.

It is a super-2 number, since 2×123131020011231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123131020011198 and 123131020011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131020011239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63943891 + ... + 65841348.

It is an arithmetic number, because the mean of its divisors is an integer number (20521901719280).

Almost surely, 2^{123131020011231} is an apocalyptic number.

123131020011231 is a deficient number, since it is larger than the sum of its proper divisors (41044193743009).

123131020011231 is a wasteful number, since it uses less digits than its factorization.

123131020011231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130101485.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 123131020011231 its reverse (132110020131321), we get a palindrome (255241040142552).

The spelling of 123131020011231 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, twenty million, eleven thousand, two hundred thirty-one".