221749266120 has 64 divisors (see below), whose sum is σ = 694171624320. Its totient is φ = 56562130944.

The previous prime is 221749266103. The next prime is 221749266161. The reversal of 221749266120 is 21662947122.

It is a happy number.

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, 40169209 + ... + 40174728.

It is an arithmetic number, because the mean of its divisors is an integer number (10846431630).

Almost surely, 2^221749266120 is an apocalyptic number.

221749266120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221749266120 is an abundant number, since it is smaller than the sum of its proper divisors (472422358200).

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

221749266120 is a wasteful number, since it uses less digits than its factorization.

221749266120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80343974 (or 80343970 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 221749266120 in words is "two hundred twenty-one billion, seven hundred forty-nine million, two hundred sixty-six thousand, one hundred twenty".