121299381888 has 64 divisors (see below), whose sum is σ = 326083514400. Its totient is φ = 39945970688.

The previous prime is 121299381809. The next prime is 121299381919. The reversal of 121299381888 is 888183992121.

It is a tau number, because it is divible by the number of its divisors (64).

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, 1871043 + ... + 1934786.

Almost surely, 2^121299381888 is an apocalyptic number.

It is an amenable number.

121299381888 is an abundant number, since it is smaller than the sum of its proper divisors (204784132512).

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

121299381888 is an equidigital number, since it uses as much as digits as its factorization.

121299381888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3805929 (or 3805917 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 60.

The spelling of 121299381888 in words is "one hundred twenty-one billion, two hundred ninety-nine million, three hundred eighty-one thousand, eight hundred eighty-eight".