211202111999 has 4 divisors (see below), whose sum is σ = 223625765664. Its totient is φ = 198778458336.

The previous prime is 211202111987. The next prime is 211202112019. The reversal of 211202111999 is 999111202112.

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 211202111999 - 2¹⁶ = 211202046463 is a prime.

It is a super-2 number, since 2×211202111999² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211202111969) 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, 6211826807 + ... + 6211826840.

It is an arithmetic number, because the mean of its divisors is an integer number (55906441416).

Almost surely, 2^211202111999 is an apocalyptic number.

211202111999 is a deficient number, since it is larger than the sum of its proper divisors (12423653665).

211202111999 is a wasteful number, since it uses less digits than its factorization.

211202111999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12423653664.

The product of its (nonzero) digits is 5832, while the sum is 38.

The spelling of 211202111999 in words is "two hundred eleven billion, two hundred two million, one hundred eleven thousand, nine hundred ninety-nine".