211199021 has 8 divisors (see below), whose sum is σ = 230506464. Its totient is φ = 191909520.

The previous prime is 211198991. The next prime is 211199029. The reversal of 211199021 is 120991112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211199021 - 2¹⁸ = 210936877 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 (211199029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36311 + ... + 41723.

It is an arithmetic number, because the mean of its divisors is an integer number (28813308).

Almost surely, 2^211199021 is an apocalyptic number.

It is an amenable number.

211199021 is a deficient number, since it is larger than the sum of its proper divisors (19307443).

211199021 is a wasteful number, since it uses less digits than its factorization.

211199021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8971.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 211199021 is about 14532.6880170187. The cubic root of 211199021 is about 595.5213010156.

The spelling of 211199021 in words is "two hundred eleven million, one hundred ninety-nine thousand, twenty-one".