221899960268 has 24 divisors (see below), whose sum is σ = 447871485600. Its totient is φ = 94227504768.

The previous prime is 221899960241. The next prime is 221899960277. The reversal of 221899960268 is 862069998122.

It is a self number, because there is not a number n which added to its sum of digits gives 221899960268.

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, 36350153 + ... + 36356256.

It is an arithmetic number, because the mean of its divisors is an integer number (18661311900).

Almost surely, 2^221899960268 is an apocalyptic number.

221899960268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

221899960268 is an abundant number, since it is smaller than the sum of its proper divisors (225971525332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221899960268 is a wasteful number, since it uses less digits than its factorization.

221899960268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72706529 (or 72706527 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 62.

The spelling of 221899960268 in words is "two hundred twenty-one billion, eight hundred ninety-nine million, nine hundred sixty thousand, two hundred sixty-eight".