212102011999 has 4 divisors (see below), whose sum is σ = 212103382936. Its totient is φ = 212100641064.

The previous prime is 212102011921. The next prime is 212102012027. The reversal of 212102011999 is 999110201212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212102011999 - 2⁷ = 212102011871 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 (212102011399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418824 + ... + 774349.

It is an arithmetic number, because the mean of its divisors is an integer number (53025845734).

Almost surely, 2^212102011999 is an apocalyptic number.

212102011999 is a deficient number, since it is larger than the sum of its proper divisors (1370937).

212102011999 is a wasteful number, since it uses less digits than its factorization.

212102011999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370936.

The product of its (nonzero) digits is 5832, while the sum is 37.

The spelling of 212102011999 in words is "two hundred twelve billion, one hundred two million, eleven thousand, nine hundred ninety-nine".