121639384704 has 32 divisors (see below), whose sum is σ = 323104616640. Its totient is φ = 40546461440.

The previous prime is 121639384687. The next prime is 121639384753. The reversal of 121639384704 is 407483936121.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×121639384704² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 158384232 + ... + 158384999.

It is an arithmetic number, because the mean of its divisors is an integer number (10097019270).

Almost surely, 2^121639384704 is an apocalyptic number.

It is an amenable number.

121639384704 is an abundant number, since it is smaller than the sum of its proper divisors (201465231936).

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

121639384704 is an equidigital number, since it uses as much as digits as its factorization.

121639384704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316769248 (or 316769236 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 48.

The spelling of 121639384704 in words is "one hundred twenty-one billion, six hundred thirty-nine million, three hundred eighty-four thousand, seven hundred four".