12420690225 has 12 divisors (see below), whose sum is σ = 20535541296. Its totient is φ = 6624368080.

The previous prime is 12420690221. The next prime is 12420690239. The reversal of 12420690225 is 52209602421.

It is not a de Polignac number, because 12420690225 - 2² = 12420690221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12420690221) 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, 82804527 + ... + 82804676.

It is an arithmetic number, because the mean of its divisors is an integer number (1711295108).

Almost surely, 2^12420690225 is an apocalyptic number.

12420690225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12420690225 is a deficient number, since it is larger than the sum of its proper divisors (8114851071).

12420690225 is a wasteful number, since it uses less digits than its factorization.

12420690225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165609216 (or 165609211 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 12420690225 in words is "twelve billion, four hundred twenty million, six hundred ninety thousand, two hundred twenty-five".