221012019984 has 40 divisors (see below), whose sum is σ = 652511679040. Its totient is φ = 63146291328.

The previous prime is 221012019967. The next prime is 221012020007. The reversal of 221012019984 is 489910210122.

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, 328886599 + ... + 328887270.

It is an arithmetic number, because the mean of its divisors is an integer number (16312791976).

Almost surely, 2^221012019984 is an apocalyptic number.

221012019984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221012019984 is an abundant number, since it is smaller than the sum of its proper divisors (431499659056).

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

221012019984 is a wasteful number, since it uses less digits than its factorization.

221012019984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657773887 (or 657773881 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 221012019984 in words is "two hundred twenty-one billion, twelve million, nineteen thousand, nine hundred eighty-four".