212102109999 has 36 divisors (see below), whose sum is σ = 334685561184. Its totient is φ = 129369187584.

The previous prime is 212102109979. The next prime is 212102110001. The reversal of 212102109999 is 999901201212.

212102109999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212102109999 - 2⁸ = 212102109743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212102109929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 445159 + ... + 788904.

It is an arithmetic number, because the mean of its divisors is an integer number (9296821144).

Almost surely, 2^212102109999 is an apocalyptic number.

212102109999 is a deficient number, since it is larger than the sum of its proper divisors (122583451185).

212102109999 is a wasteful number, since it uses less digits than its factorization.

212102109999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234208 (or 1234192 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The spelling of 212102109999 in words is "two hundred twelve billion, one hundred two million, one hundred nine thousand, nine hundred ninety-nine".