201921228098 has 6 divisors (see below), whose sum is σ = 302882795379. Its totient is φ = 100960296306.

The previous prime is 201921228077. The next prime is 201921228107. The reversal of 201921228098 is 890822129102.

It can be written as a sum of positive squares in only one way, i.e., 100960614049 + 100960614049 = 317743^2 + 317743^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=317743.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 476615 + ... + 794357.

Almost surely, 2^201921228098 is an apocalyptic number.

201921228098 is a deficient number, since it is larger than the sum of its proper divisors (100961567281).

201921228098 is an frugal number, since it uses more digits than its factorization.

201921228098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635488 (or 317745 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 201921228098 in words is "two hundred one billion, nine hundred twenty-one million, two hundred twenty-eight thousand, ninety-eight".