212102009999 has 16 divisors (see below), whose sum is σ = 233146892160. Its totient is φ = 191352113760.

The previous prime is 212102009941. The next prime is 212102010007. The reversal of 212102009999 is 999900201212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212102009999 - 2¹² = 212102005903 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 (212102009909) 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, 3759332 + ... + 3815334.

It is an arithmetic number, because the mean of its divisors is an integer number (14571680760).

Almost surely, 2^212102009999 is an apocalyptic number.

212102009999 is a deficient number, since it is larger than the sum of its proper divisors (21044882161).

212102009999 is a wasteful number, since it uses less digits than its factorization.

212102009999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58630.

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

The spelling of 212102009999 in words is "two hundred twelve billion, one hundred two million, nine thousand, nine hundred ninety-nine".