121966628820 has 24 divisors (see below), whose sum is σ = 341506560864. Its totient is φ = 32524434336.

The previous prime is 121966628803. The next prime is 121966628863. The reversal of 121966628820 is 28826669121.

It is a happy number.

121966628820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1016388514 + ... + 1016388633.

It is an arithmetic number, because the mean of its divisors is an integer number (14229440036).

Almost surely, 2^121966628820 is an apocalyptic number.

121966628820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121966628820 is an abundant number, since it is smaller than the sum of its proper divisors (219539932044).

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

121966628820 is a wasteful number, since it uses less digits than its factorization.

121966628820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032777159 (or 2032777157 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 51.

The spelling of 121966628820 in words is "one hundred twenty-one billion, nine hundred sixty-six million, six hundred twenty-eight thousand, eight hundred twenty".