2100021201988 has 12 divisors (see below), whose sum is σ = 3676596321132. Its totient is φ = 1049565110240.

The previous prime is 2100021201959. The next prime is 2100021202007. The reversal of 2100021201988 is 8891021200012.

It can be written as a sum of positive squares in 2 ways, for example, as 652350213124 + 1447670988864 = 807682^2 + 1203192^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111362083 + ... + 111380938.

It is an arithmetic number, because the mean of its divisors is an integer number (306383026761).

Almost surely, 2^{2100021201988} is an apocalyptic number.

It is an amenable number.

2100021201988 is a deficient number, since it is larger than the sum of its proper divisors (1576575119144).

2100021201988 is a wasteful number, since it uses less digits than its factorization.

2100021201988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222745382 (or 222745380 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 2100021201988 in words is "two trillion, one hundred billion, twenty-one million, two hundred one thousand, nine hundred eighty-eight".