210021000209999 has 8 divisors (see below), whose sum is σ = 232997103469440. Its totient is φ = 187692111127000.

The previous prime is 210021000209953. The next prime is 210021000210001. The reversal of 210021000209999 is 999902000120012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 210021000209999 - 2⁸ = 210021000209743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021000209099) 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, 161803543427 + ... + 161803544724.

It is an arithmetic number, because the mean of its divisors is an integer number (29124637933680).

Almost surely, 2^{210021000209999} is an apocalyptic number.

210021000209999 is a deficient number, since it is larger than the sum of its proper divisors (22976103259441).

210021000209999 is a wasteful number, since it uses less digits than its factorization.

210021000209999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323607088221.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 210021000209999 in words is "two hundred ten trillion, twenty-one billion, two hundred nine thousand, nine hundred ninety-nine".