121693890104 has 8 divisors (see below), whose sum is σ = 228176043960. Its totient is φ = 60846945048.

The previous prime is 121693890079. The next prime is 121693890127. The reversal of 121693890104 is 401098396121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7605868124 + ... + 7605868139.

It is an arithmetic number, because the mean of its divisors is an integer number (28522005495).

Almost surely, 2^121693890104 is an apocalyptic number.

It is an amenable number.

121693890104 is a deficient number, since it is larger than the sum of its proper divisors (106482153856).

121693890104 is a wasteful number, since it uses less digits than its factorization.

121693890104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15211736269 (or 15211736265 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The spelling of 121693890104 in words is "one hundred twenty-one billion, six hundred ninety-three million, eight hundred ninety thousand, one hundred four".