221099708460 has 48 divisors (see below), whose sum is σ = 639049485312. Its totient is φ = 57057988800.

The previous prime is 221099708449. The next prime is 221099708503. The reversal of 221099708460 is 64807990122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59433546 + ... + 59437265.

It is an arithmetic number, because the mean of its divisors is an integer number (13313530944).

Almost surely, 2^221099708460 is an apocalyptic number.

221099708460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221099708460 is an abundant number, since it is smaller than the sum of its proper divisors (417949776852).

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

221099708460 is a wasteful number, since it uses less digits than its factorization.

221099708460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118870854 (or 118870852 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 221099708460 in words is "two hundred twenty-one billion, ninety-nine million, seven hundred eight thousand, four hundred sixty".