211221002199 has 4 divisors (see below), whose sum is σ = 281628002936. Its totient is φ = 140814001464.

The previous prime is 211221002191. The next prime is 211221002257. The reversal of 211221002199 is 991200122112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 211221002199 - 2³ = 211221002191 is a prime.

It is a super-2 number, since 2×211221002199² (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 (211221002191) 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, 35203500364 + ... + 35203500369.

It is an arithmetic number, because the mean of its divisors is an integer number (70407000734).

Almost surely, 2^211221002199 is an apocalyptic number.

211221002199 is a deficient number, since it is larger than the sum of its proper divisors (70407000737).

211221002199 is an equidigital number, since it uses as much as digits as its factorization.

211221002199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70407000736.

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 211221002199 in words is "two hundred eleven billion, two hundred twenty-one million, two thousand, one hundred ninety-nine".