211000221999 has 16 divisors (see below), whose sum is σ = 357249053440. Its totient is φ = 120571555320.

The previous prime is 211000221997. The next prime is 211000222021. The reversal of 211000221999 is 999122000112.

It is not a de Polignac number, because 211000221999 - 2¹ = 211000221997 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 (211000221997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 558201457 + ... + 558201834.

It is an arithmetic number, because the mean of its divisors is an integer number (22328065840).

Almost surely, 2^211000221999 is an apocalyptic number.

211000221999 is a deficient number, since it is larger than the sum of its proper divisors (146248831441).

211000221999 is a wasteful number, since it uses less digits than its factorization.

211000221999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116403307 (or 1116403301 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The spelling of 211000221999 in words is "two hundred eleven billion, two hundred twenty-one thousand, nine hundred ninety-nine".