211222200209 has 4 divisors (see below), whose sum is σ = 211224879600. Its totient is φ = 211219520820.

The previous prime is 211222200187. The next prime is 211222200227. The reversal of 211222200209 is 902002222112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211222200209 is a prime.

It is a super-2 number, since 2×211222200209² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211222200239) 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, 1217747 + ... + 1380344.

It is an arithmetic number, because the mean of its divisors is an integer number (52806219900).

Almost surely, 2^211222200209 is an apocalyptic number.

It is an amenable number.

211222200209 is a deficient number, since it is larger than the sum of its proper divisors (2679391).

211222200209 is an equidigital number, since it uses as much as digits as its factorization.

211222200209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679390.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 211222200209 in words is "two hundred eleven billion, two hundred twenty-two million, two hundred thousand, two hundred nine".