123031122120191 has 6 divisors (see below), whose sum is σ = 128612874353040. Its totient is φ = 117681942897068.

The previous prime is 123031122120173. The next prime is 123031122120197. The reversal of 123031122120191 is 191021221130321.

It is not a de Polignac number, because 123031122120191 - 2¹⁴ = 123031122103807 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 (123031122120197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 116286504311 + ... + 116286505368.

It is an arithmetic number, because the mean of its divisors is an integer number (21435479058840).

Almost surely, 2^{123031122120191} is an apocalyptic number.

123031122120191 is a deficient number, since it is larger than the sum of its proper divisors (5581752232849).

123031122120191 is an equidigital number, since it uses as much as digits as its factorization.

123031122120191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232573009725 (or 232573009702 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 123031122120191 in words is "one hundred twenty-three trillion, thirty-one billion, one hundred twenty-two million, one hundred twenty thousand, one hundred ninety-one".