121679959919428 has 48 divisors (see below), whose sum is σ = 224416982200320. Its totient is φ = 57568536787104.

The previous prime is 121679959919377. The next prime is 121679959919437. The reversal of 121679959919428 is 824919959976121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1088637201 + ... + 1088748967.

It is an arithmetic number, because the mean of its divisors is an integer number (4675353795840).

Almost surely, 2^{121679959919428} is an apocalyptic number.

It is an amenable number.

121679959919428 is a deficient number, since it is larger than the sum of its proper divisors (102737022280892).

121679959919428 is a wasteful number, since it uses less digits than its factorization.

121679959919428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128896 (or 128894 counting only the distinct ones).

The product of its digits is 1587237120, while the sum is 82.

The spelling of 121679959919428 in words is "one hundred twenty-one trillion, six hundred seventy-nine billion, nine hundred fifty-nine million, nine hundred nineteen thousand, four hundred twenty-eight".