121680809458 has 32 divisors (see below), whose sum is σ = 208447900416. Its totient is φ = 52774495488.

The previous prime is 121680809447. The next prime is 121680809483. The reversal of 121680809458 is 854908086121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70135 + ... + 498277.

It is an arithmetic number, because the mean of its divisors is an integer number (6513996888).

Almost surely, 2^121680809458 is an apocalyptic number.

121680809458 is a deficient number, since it is larger than the sum of its proper divisors (86767090958).

121680809458 is a wasteful number, since it uses less digits than its factorization.

121680809458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428818.

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 121680809458 in words is "one hundred twenty-one billion, six hundred eighty million, eight hundred nine thousand, four hundred fifty-eight".