2021001101992 has 16 divisors (see below), whose sum is σ = 3860874747540. Its totient is φ = 991434502656.

The previous prime is 2021001101989. The next prime is 2021001102011. The reversal of 2021001101992 is 2991011001202.

It can be written as a sum of positive squares in 2 ways, for example, as 1905432379876 + 115568722116 = 1380374^2 + 339954^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2021001101992.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2383255593 + ... + 2383256440.

Almost surely, 2^{2021001101992} is an apocalyptic number.

It is an amenable number.

2021001101992 is a deficient number, since it is larger than the sum of its proper divisors (1839873645548).

2021001101992 is a wasteful number, since it uses less digits than its factorization.

2021001101992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4766512092 (or 4766512088 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 2021001101992 in words is "two trillion, twenty-one billion, one million, one hundred one thousand, nine hundred ninety-two".