212012201999 has 6 divisors (see below), whose sum is σ = 229575343176. Its totient is φ = 195703570920.

The previous prime is 212012201923. The next prime is 212012202041. The reversal of 212012201999 is 999102210212.

It is a happy number.

It is not a de Polignac number, because 212012201999 - 2⁸ = 212012201743 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 (212012201299) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 627254867 + ... + 627255204.

It is an arithmetic number, because the mean of its divisors is an integer number (38262557196).

Almost surely, 2^212012201999 is an apocalyptic number.

212012201999 is a deficient number, since it is larger than the sum of its proper divisors (17563141177).

212012201999 is a wasteful number, since it uses less digits than its factorization.

212012201999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254510097 (or 1254510084 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 212012201999 in words is "two hundred twelve billion, twelve million, two hundred one thousand, nine hundred ninety-nine".