2202111991 has 2 divisors, whose sum is σ = 2202111992. Its totient is φ = 2202111990.

The previous prime is 2202111971. The next prime is 2202112043. The reversal of 2202111991 is 1991112022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2202111991 - 2¹⁵ = 2202079223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2202111971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1101055995 + 1101055996.

It is an arithmetic number, because the mean of its divisors is an integer number (1101055996).

Almost surely, 2^2202111991 is an apocalyptic number.

2202111991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2202111991 is an equidigital number, since it uses as much as digits as its factorization.

2202111991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 2202111991 is about 46926.6660972202. Note that the first 3 decimals coincide. The cubic root of 2202111991 is about 1301.0075012324.

The spelling of 2202111991 in words is "two billion, two hundred two million, one hundred eleven thousand, nine hundred ninety-one".