12421720377560 has 32 divisors (see below), whose sum is σ = 30098783993040. Its totient is φ = 4586481369984.

The previous prime is 12421720377553. The next prime is 12421720377589. The reversal of 12421720377560 is 6577302712421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11943961382 + ... + 11943962421.

Almost surely, 2^{12421720377560} is an apocalyptic number.

12421720377560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12421720377560 is an abundant number, since it is smaller than the sum of its proper divisors (17677063615480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12421720377560 is a wasteful number, since it uses less digits than its factorization.

12421720377560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23887923827 (or 23887923823 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 12421720377560 in words is "twelve trillion, four hundred twenty-one billion, seven hundred twenty million, three hundred seventy-seven thousand, five hundred sixty".