2001020211999 has 18 divisors (see below), whose sum is σ = 2925605826000. Its totient is φ = 1317940982328.

The previous prime is 2001020211979. The next prime is 2001020212001. The reversal of 2001020211999 is 9991120201002.

It is not a de Polignac number, because 2001020211999 - 2²⁷ = 2000885994271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001020211979) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16074999 + ... + 16199000.

It is an arithmetic number, because the mean of its divisors is an integer number (162533657000).

Almost surely, 2^{2001020211999} is an apocalyptic number.

2001020211999 is a deficient number, since it is larger than the sum of its proper divisors (924585614001).

2001020211999 is an equidigital number, since it uses as much as digits as its factorization.

2001020211999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32274171 (or 32274085 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 2001020211999 in words is "two trillion, one billion, twenty million, two hundred eleven thousand, nine hundred ninety-nine".