121655032198 has 32 divisors (see below), whose sum is σ = 221724988416. Its totient is φ = 48930037728.

The previous prime is 121655032181. The next prime is 121655032199. The reversal of 121655032198 is 891230556121.

121655032198 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×121655032198² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121655032199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3547186 + ... + 3581317.

It is an arithmetic number, because the mean of its divisors is an integer number (6928905888).

Almost surely, 2^121655032198 is an apocalyptic number.

121655032198 is a deficient number, since it is larger than the sum of its proper divisors (100069956218).

121655032198 is a wasteful number, since it uses less digits than its factorization.

121655032198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7128588.

The product of its (nonzero) digits is 129600, while the sum is 43.

The spelling of 121655032198 in words is "one hundred twenty-one billion, six hundred fifty-five million, thirty-two thousand, one hundred ninety-eight".