2100000221988 has 24 divisors (see below), whose sum is σ = 4924873622592. Its totient is φ = 696446773344.

The previous prime is 2100000221983. The next prime is 2100000222037. The reversal of 2100000221988 is 8891220000012.

It is not an unprimeable number, because it can be changed into a prime (2100000221983) 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, 444160120 + ... + 444164847.

It is an arithmetic number, because the mean of its divisors is an integer number (205203067608).

Almost surely, 2^{2100000221988} is an apocalyptic number.

It is an amenable number.

2100000221988 is an abundant number, since it is smaller than the sum of its proper divisors (2824873400604).

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

2100000221988 is a wasteful number, since it uses less digits than its factorization.

2100000221988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888325171 (or 888325169 counting only the distinct ones).

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

The spelling of 2100000221988 in words is "two trillion, one hundred billion, two hundred twenty-one thousand, nine hundred eighty-eight".