213011111999 has 12 divisors (see below), whose sum is σ = 247926122928. Its totient is φ = 182479500000.

The previous prime is 213011111933. The next prime is 213011112001. The reversal of 213011111999 is 999111110312.

It is a happy number.

213011111999 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 213011111999 - 2⁸ = 213011111743 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 (213011111099) 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 11 ways as a sum of consecutive naturals, for example, 1118627 + ... + 1295124.

It is an arithmetic number, because the mean of its divisors is an integer number (20660510244).

Almost surely, 2^213011111999 is an apocalyptic number.

213011111999 is a deficient number, since it is larger than the sum of its proper divisors (34915010929).

213011111999 is a wasteful number, since it uses less digits than its factorization.

213011111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415566 (or 2415559 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 38.

The spelling of 213011111999 in words is "two hundred thirteen billion, eleven million, one hundred eleven thousand, nine hundred ninety-nine".