123021455225 has 24 divisors (see below), whose sum is σ = 157703552160. Its totient is φ = 95137297920.

The previous prime is 123021455203. The next prime is 123021455231. The reversal of 123021455225 is 522554120321.

It is a de Polignac number, because none of the positive numbers 2^k-123021455225 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123021455191 and 123021455200.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 485615 + ... + 694164.

It is an arithmetic number, because the mean of its divisors is an integer number (6570981340).

Almost surely, 2^123021455225 is an apocalyptic number.

It is an amenable number.

123021455225 is a deficient number, since it is larger than the sum of its proper divisors (34682096935).

123021455225 is a wasteful number, since it uses less digits than its factorization.

123021455225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179929 (or 1179924 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 123021455225 its reverse (522554120321), we get a palindrome (645575575546).

The spelling of 123021455225 in words is "one hundred twenty-three billion, twenty-one million, four hundred fifty-five thousand, two hundred twenty-five".