123031133101 has 4 divisors (see below), whose sum is σ = 125648816832. Its totient is φ = 120413449372.

The previous prime is 123031133059. The next prime is 123031133111. The reversal of 123031133101 is 101331130321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 101331130321 = 173 ⋅585729077.

It is a cyclic number.

It is not a de Polignac number, because 123031133101 - 2⁹ = 123031132589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123031133111) 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, 1308841795 + ... + 1308841888.

It is an arithmetic number, because the mean of its divisors is an integer number (31412204208).

Almost surely, 2^123031133101 is an apocalyptic number.

It is an amenable number.

123031133101 is a deficient number, since it is larger than the sum of its proper divisors (2617683731).

123031133101 is an equidigital number, since it uses as much as digits as its factorization.

123031133101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2617683730.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 123031133101 its reverse (101331130321), we get a palindrome (224362263422).

The spelling of 123031133101 in words is "one hundred twenty-three billion, thirty-one million, one hundred thirty-three thousand, one hundred one".