210021201999 has 16 divisors (see below), whose sum is σ = 355591453440. Its totient is φ = 120012115320.

The previous prime is 210021201983. The next prime is 210021202019. The reversal of 210021201999 is 999102120012.

It is not a de Polignac number, because 210021201999 - 2⁴ = 210021201983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021201499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 555611457 + ... + 555611834.

It is an arithmetic number, because the mean of its divisors is an integer number (22224465840).

Almost surely, 2^210021201999 is an apocalyptic number.

210021201999 is a deficient number, since it is larger than the sum of its proper divisors (145570251441).

210021201999 is a wasteful number, since it uses less digits than its factorization.

210021201999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111223307 (or 1111223301 counting only the distinct ones).

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

The spelling of 210021201999 in words is "two hundred ten billion, twenty-one million, two hundred one thousand, nine hundred ninety-nine".