198228912101 has 4 divisors (see below), whose sum is σ = 216249722304. Its totient is φ = 180208101900.

The previous prime is 198228912061. The next prime is 198228912113. The reversal of 198228912101 is 101219822891.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198228912101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198228912181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9010405085 + ... + 9010405106.

It is an arithmetic number, because the mean of its divisors is an integer number (54062430576).

Almost surely, 2^198228912101 is an apocalyptic number.

198228912101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

198228912101 is a deficient number, since it is larger than the sum of its proper divisors (18020810203).

198228912101 is a wasteful number, since it uses less digits than its factorization.

198228912101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18020810202.

The product of its (nonzero) digits is 41472, while the sum is 44.

The spelling of 198228912101 in words is "one hundred ninety-eight billion, two hundred twenty-eight million, nine hundred twelve thousand, one hundred one".