123142031123 has 4 divisors (see below), whose sum is σ = 123144740640. Its totient is φ = 123139321608.

The previous prime is 123142031099. The next prime is 123142031137. The reversal of 123142031123 is 321130241321.

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 123142031123 - 2²⁶ = 123074922259 is a prime.

It is a super-2 number, since 2×123142031123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123142031143) 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, 1285403 + ... + 1377876.

It is an arithmetic number, because the mean of its divisors is an integer number (30786185160).

Almost surely, 2^123142031123 is an apocalyptic number.

123142031123 is a deficient number, since it is larger than the sum of its proper divisors (2709517).

123142031123 is an equidigital number, since it uses as much as digits as its factorization.

123142031123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709516.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 123142031123 its reverse (321130241321), we get a palindrome (444272272444).

The spelling of 123142031123 in words is "one hundred twenty-three billion, one hundred forty-two million, thirty-one thousand, one hundred twenty-three".