121220000198 has 64 divisors (see below), whose sum is σ = 203410980864. Its totient is φ = 53715312000.

The previous prime is 121220000179. The next prime is 121220000263. The reversal of 121220000198 is 891000022121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93030815 + ... + 93032117.

It is an arithmetic number, because the mean of its divisors is an integer number (3178296576).

Almost surely, 2^121220000198 is an apocalyptic number.

121220000198 is a deficient number, since it is larger than the sum of its proper divisors (82190980666).

121220000198 is a wasteful number, since it uses less digits than its factorization.

121220000198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941.

The product of its (nonzero) digits is 576, while the sum is 26.

The spelling of 121220000198 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred ninety-eight", and thus it is an aban number.