221100021092 has 24 divisors (see below), whose sum is σ = 389250271872. Its totient is φ = 109885949600.

The previous prime is 221100021071. The next prime is 221100021137. The reversal of 221100021092 is 290120001122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3212117 + ... + 3280227.

It is an arithmetic number, because the mean of its divisors is an integer number (16218761328).

Almost surely, 2^221100021092 is an apocalyptic number.

It is an amenable number.

221100021092 is a deficient number, since it is larger than the sum of its proper divisors (168150250780).

221100021092 is a wasteful number, since it uses less digits than its factorization.

221100021092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72979 (or 72977 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 221100021092 in words is "two hundred twenty-one billion, one hundred million, twenty-one thousand, ninety-two".