121659221198 has 16 divisors (see below), whose sum is σ = 187000107840. Its totient is φ = 59326809600.

The previous prime is 121659221137. The next prime is 121659221207. The reversal of 121659221198 is 891122956121.

It is a super-2 number, since 2×121659221198² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17918 + ... + 493598.

It is an arithmetic number, because the mean of its divisors is an integer number (11687506740).

Almost surely, 2^121659221198 is an apocalyptic number.

121659221198 is a deficient number, since it is larger than the sum of its proper divisors (65340886642).

121659221198 is a wasteful number, since it uses less digits than its factorization.

121659221198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478843.

The product of its digits is 155520, while the sum is 47.

The spelling of 121659221198 in words is "one hundred twenty-one billion, six hundred fifty-nine million, two hundred twenty-one thousand, one hundred ninety-eight".