220001021988 has 24 divisors (see below), whose sum is σ = 560002601760. Its totient is φ = 66666976320.

The previous prime is 220001021939. The next prime is 220001021993. The reversal of 220001021988 is 889120100022.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 833337073 + ... + 833337336.

It is an arithmetic number, because the mean of its divisors is an integer number (23333441740).

Almost surely, 2^220001021988 is an apocalyptic number.

It is an amenable number.

220001021988 is an abundant number, since it is smaller than the sum of its proper divisors (340001579772).

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

220001021988 is a wasteful number, since it uses less digits than its factorization.

220001021988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666674427 (or 1666674425 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The spelling of 220001021988 in words is "two hundred twenty billion, one million, twenty-one thousand, nine hundred eighty-eight".