121287813632 has 40 divisors (see below), whose sum is σ = 242372138976. Its totient is φ = 60635548672.

The previous prime is 121287813601. The next prime is 121287813649. The reversal of 121287813632 is 236318782121.

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, 5561213 + ... + 5582979.

Almost surely, 2^121287813632 is an apocalyptic number.

It is an amenable number.

121287813632 is a deficient number, since it is larger than the sum of its proper divisors (121084325344).

121287813632 is an equidigital number, since it uses as much as digits as its factorization.

121287813632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32668 (or 32652 counting only the distinct ones).

The product of its digits is 193536, while the sum is 44.

The spelling of 121287813632 in words is "one hundred twenty-one billion, two hundred eighty-seven million, eight hundred thirteen thousand, six hundred thirty-two".