123400126660225 has 12 divisors (see below), whose sum is σ = 153024700752640. Its totient is φ = 98714589267600.

The previous prime is 123400126660207. The next prime is 123400126660229. The reversal of 123400126660225 is 522066621004321.

It is a happy number.

It is not a de Polignac number, because 123400126660225 - 2¹⁷ = 123400126529153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123400126660229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137344785 + ... + 138240334.

Almost surely, 2^{123400126660225} is an apocalyptic number.

It is an amenable number.

123400126660225 is a deficient number, since it is larger than the sum of its proper divisors (29624574092415).

123400126660225 is a wasteful number, since it uses less digits than its factorization.

123400126660225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275603040 (or 275603035 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 123400126660225 its reverse (522066621004321), we get a palindrome (645466747664546).

The spelling of 123400126660225 in words is "one hundred twenty-three trillion, four hundred billion, one hundred twenty-six million, six hundred sixty thousand, two hundred twenty-five".