212012211999 has 16 divisors (see below), whose sum is σ = 334206443520. Its totient is φ = 116972254560.

The previous prime is 212012211997. The next prime is 212012212033. The reversal of 212012211999 is 999112210212.

It is a happy number.

It is not a de Polignac number, because 212012211999 - 2¹ = 212012211997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212012211997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174065247 + ... + 174066464.

It is an arithmetic number, because the mean of its divisors is an integer number (20887902720).

Almost surely, 2^212012211999 is an apocalyptic number.

212012211999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

212012211999 is a deficient number, since it is larger than the sum of its proper divisors (122194231521).

212012211999 is a wasteful number, since it uses less digits than its factorization.

212012211999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348131750.

The product of its (nonzero) digits is 11664, while the sum is 39.

The spelling of 212012211999 in words is "two hundred twelve billion, twelve million, two hundred eleven thousand, nine hundred ninety-nine".