121420336864 has 24 divisors (see below), whose sum is σ = 239086912680. Its totient is φ = 60699851136.

The previous prime is 121420336859. The next prime is 121420336867. The reversal of 121420336864 is 468633024121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121420336867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129399 + ... + 509494.

It is an arithmetic number, because the mean of its divisors is an integer number (9961954695).

Almost surely, 2^121420336864 is an apocalyptic number.

It is an amenable number.

121420336864 is a deficient number, since it is larger than the sum of its proper divisors (117666575816).

121420336864 is an equidigital number, since it uses as much as digits as its factorization.

121420336864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644842 (or 644834 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 121420336864 in words is "one hundred twenty-one billion, four hundred twenty million, three hundred thirty-six thousand, eight hundred sixty-four".