12421601631536 has 20 divisors (see below), whose sum is σ = 24067225248552. Its totient is φ = 6210704793216.

The previous prime is 12421601631529. The next prime is 12421601631553. The reversal of 12421601631536 is 63513610612421.

It is a junction number, because it is equal to n+sod(n) for n = 12421601631493 and 12421601631502.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4928366 + ... + 7009421.

Almost surely, 2^{12421601631536} is an apocalyptic number.

12421601631536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12421601631536 is a deficient number, since it is larger than the sum of its proper divisors (11645623617016).

12421601631536 is a wasteful number, since it uses less digits than its factorization.

12421601631536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12002828 (or 12002822 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 12421601631536 in words is "twelve trillion, four hundred twenty-one billion, six hundred one million, six hundred thirty-one thousand, five hundred thirty-six".