2022211991 has 2 divisors, whose sum is σ = 2022211992. Its totient is φ = 2022211990.

The previous prime is 2022211981. The next prime is 2022211993. The reversal of 2022211991 is 1991122202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2022211991 - 2²⁶ = 1955103127 is a prime.

Together with 2022211993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2022211993) 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 as a sum of consecutive naturals, namely, 1011105995 + 1011105996.

It is an arithmetic number, because the mean of its divisors is an integer number (1011105996).

Almost surely, 2^2022211991 is an apocalyptic number.

2022211991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2022211991 is an equidigital number, since it uses as much as digits as its factorization.

2022211991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 2022211991 is about 44969.0114523324. The cubic root of 2022211991 is about 1264.5681145293.

It can be divided in two parts, 2022211 and 991, that added together give a palindrome (2023202).

The spelling of 2022211991 in words is "two billion, twenty-two million, two hundred eleven thousand, nine hundred ninety-one".