211222221212191 has 6 divisors (see below), whose sum is σ = 245707481818320. Its totient is φ = 181047618181836.

The previous prime is 211222221212137. The next prime is 211222221212203. The reversal of 211222221212191 is 191212122222112.

It is not a de Polignac number, because 211222221212191 - 2¹⁵ = 211222221179423 is a prime.

It is a super-2 number, since 2×211222221212191² (a number of 29 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 (211222221212491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2155328787831 + ... + 2155328787928.

It is an arithmetic number, because the mean of its divisors is an integer number (40951246969720).

Almost surely, 2^{211222221212191} is an apocalyptic number.

211222221212191 is a deficient number, since it is larger than the sum of its proper divisors (34485260606129).

211222221212191 is an equidigital number, since it uses as much as digits as its factorization.

211222221212191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310657575773 (or 4310657575766 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The spelling of 211222221212191 in words is "two hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred twelve thousand, one hundred ninety-one".