123042221125 has 32 divisors (see below), whose sum is σ = 164378448000. Its totient is φ = 91672387200.

The previous prime is 123042221123. The next prime is 123042221143. The reversal of 123042221125 is 521122240321.

It is not a de Polignac number, because 123042221125 - 2¹ = 123042221123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 123042221125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123042221123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298920 + ... + 579169.

It is an arithmetic number, because the mean of its divisors is an integer number (5136826500).

Almost surely, 2^123042221125 is an apocalyptic number.

It is an amenable number.

123042221125 is a deficient number, since it is larger than the sum of its proper divisors (41336226875).

123042221125 is an equidigital number, since it uses as much as digits as its factorization.

123042221125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878182 (or 878172 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 123042221125 its reverse (521122240321), we get a palindrome (644164461446).

The spelling of 123042221125 in words is "one hundred twenty-three billion, forty-two million, two hundred twenty-one thousand, one hundred twenty-five".