198380992221 has 24 divisors (see below), whose sum is σ = 293275753056. Its totient is φ = 129151239840.

The previous prime is 198380992127. The next prime is 198380992273. The reversal of 198380992221 is 122299083891.

It is not a de Polignac number, because 198380992221 - 2⁹ = 198380991709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198380992291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1884931 + ... + 1987391.

It is an arithmetic number, because the mean of its divisors is an integer number (12219823044).

Almost surely, 2^198380992221 is an apocalyptic number.

It is an amenable number.

198380992221 is a deficient number, since it is larger than the sum of its proper divisors (94894760835).

198380992221 is a wasteful number, since it uses less digits than its factorization.

198380992221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107513 (or 107510 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The spelling of 198380992221 in words is "one hundred ninety-eight billion, three hundred eighty million, nine hundred ninety-two thousand, two hundred twenty-one".