221200101992 has 16 divisors (see below), whose sum is σ = 414755181540. Its totient is φ = 110598720256.

The previous prime is 221200101977. The next prime is 221200102021. The reversal of 221200101992 is 299101002122.

It can be written as a sum of positive squares in 2 ways, for example, as 204598810276 + 16601291716 = 452326^2 + 128846^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1209578 + ... + 1380390.

Almost surely, 2^221200101992 is an apocalyptic number.

It is an amenable number.

221200101992 is a deficient number, since it is larger than the sum of its proper divisors (193555079548).

221200101992 is a wasteful number, since it uses less digits than its factorization.

221200101992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332692 (or 332688 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 221200101992 in words is "two hundred twenty-one billion, two hundred million, one hundred one thousand, nine hundred ninety-two".