211132205991 has 32 divisors (see below), whose sum is σ = 357508697600. Its totient is φ = 120634764480.

The previous prime is 211132205989. The next prime is 211132206083. The reversal of 211132205991 is 199502231112.

211132205991 is a `hidden beast` number, since 2 + 1 + 11 + 32 + 20 + 599 + 1 = 666.

It is not a de Polignac number, because 211132205991 - 2¹ = 211132205989 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 (211132201991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2016411 + ... + 2118531.

It is an arithmetic number, because the mean of its divisors is an integer number (11172146800).

Almost surely, 2^211132205991 is an apocalyptic number.

211132205991 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211132205991 is a deficient number, since it is larger than the sum of its proper divisors (146376491609).

211132205991 is a wasteful number, since it uses less digits than its factorization.

211132205991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113076 (or 113070 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The spelling of 211132205991 in words is "two hundred eleven billion, one hundred thirty-two million, two hundred five thousand, nine hundred ninety-one".