123402100225 has 12 divisors (see below), whose sum is σ = 153023380480. Its totient is φ = 98718598800.

The previous prime is 123402100219. The next prime is 123402100253. The reversal of 123402100225 is 522001204321.

It is a happy number.

It is not a de Polignac number, because 123402100225 - 2⁵ = 123402100193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123402100196 and 123402100205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1081660 + ... + 1190290.

Almost surely, 2^123402100225 is an apocalyptic number.

It is an amenable number.

123402100225 is a deficient number, since it is larger than the sum of its proper divisors (29621280255).

123402100225 is a wasteful number, since it uses less digits than its factorization.

123402100225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154080 (or 154075 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 123402100225 its reverse (522001204321), we get a palindrome (645403304546).

The spelling of 123402100225 in words is "one hundred twenty-three billion, four hundred two million, one hundred thousand, two hundred twenty-five".