211222101111209 has 8 divisors (see below), whose sum is σ = 211281391181640. Its totient is φ = 211162812771456.

The previous prime is 211222101111199. The next prime is 211222101111221. The reversal of 211222101111209 is 902111101222112.

It can be written as a sum of positive squares in 4 ways, for example, as 181852237267600 + 29369863843609 = 13485260^2 + 5419397^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 211222101111209 - 2⁸ = 211222101110953 is a prime.

It is a super-2 number, since 2×211222101111209² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211222101114209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266740067 + ... + 267530759.

It is an arithmetic number, because the mean of its divisors is an integer number (26410173897705).

Almost surely, 2^{211222101111209} is an apocalyptic number.

It is an amenable number.

211222101111209 is a deficient number, since it is larger than the sum of its proper divisors (59290070431).

211222101111209 is an equidigital number, since it uses as much as digits as its factorization.

211222101111209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865339.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 211222101111209 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred one million, one hundred eleven thousand, two hundred nine".