221920059880 has 32 divisors (see below), whose sum is σ = 502383463200. Its totient is φ = 88223432256.

The previous prime is 221920059859. The next prime is 221920059887. The reversal of 221920059880 is 88950029122.

It is a super-2 number, since 2×221920059880² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221920059880.

It is not an unprimeable number, because it can be changed into a prime (221920059887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17011890 + ... + 17024929.

It is an arithmetic number, because the mean of its divisors is an integer number (15699483225).

Almost surely, 2^221920059880 is an apocalyptic number.

221920059880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221920059880 is an abundant number, since it is smaller than the sum of its proper divisors (280463403320).

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

221920059880 is a wasteful number, since it uses less digits than its factorization.

221920059880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34036993 (or 34036989 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The spelling of 221920059880 in words is "two hundred twenty-one billion, nine hundred twenty million, fifty-nine thousand, eight hundred eighty".