121421583936 has 63 divisors (see below), whose sum is σ = 348057019531. Its totient is φ = 40471073664.

The previous prime is 121421583931. The next prime is 121421583967. The reversal of 121421583936 is 639385124121.

The square root of 121421583936 is 348456.

It is a perfect power (a square), and thus also a powerful number.

121421583936 is a `hidden beast` number, since 1 + 2 + 14 + 21 + 583 + 9 + 36 = 666.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121421583891 and 121421583900.

It is not an unprimeable number, because it can be changed into a prime (121421583931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8355685 + ... + 8370203.

Almost surely, 2^121421583936 is an apocalyptic number.

121421583936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

121421583936 is the 348456-th square number.

It is an amenable number.

121421583936 is an abundant number, since it is smaller than the sum of its proper divisors (226635435595).

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

121421583936 is an frugal number, since it uses more digits than its factorization.

121421583936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29056 (or 14524 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 121421583936 in words is "one hundred twenty-one billion, four hundred twenty-one million, five hundred eighty-three thousand, nine hundred thirty-six".