12221607536 has 10 divisors (see below), whose sum is σ = 23679364632. Its totient is φ = 6110803760.

The previous prime is 12221607527. The next prime is 12221607599. The reversal of 12221607536 is 63570612221.

It is a junction number, because it is equal to n+sod(n) for n = 12221607496 and 12221607505.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 381925220 + ... + 381925251.

Almost surely, 2^12221607536 is an apocalyptic number.

12221607536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12221607536 is a deficient number, since it is larger than the sum of its proper divisors (11457757096).

12221607536 is an equidigital number, since it uses as much as digits as its factorization.

12221607536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763850479 (or 763850473 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 12221607536 in words is "twelve billion, two hundred twenty-one million, six hundred seven thousand, five hundred thirty-six".