121207568020 has 48 divisors (see below), whose sum is σ = 317343454848. Its totient is φ = 37778981760.

The previous prime is 121207568011. The next prime is 121207568021. The reversal of 121207568020 is 20865702121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121207568021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39351567 + ... + 39354646.

It is an arithmetic number, because the mean of its divisors is an integer number (6611321976).

Almost surely, 2^121207568020 is an apocalyptic number.

121207568020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121207568020 is an abundant number, since it is smaller than the sum of its proper divisors (196135886828).

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

121207568020 is a wasteful number, since it uses less digits than its factorization.

121207568020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78706240 (or 78706238 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The spelling of 121207568020 in words is "one hundred twenty-one billion, two hundred seven million, five hundred sixty-eight thousand, twenty".