2111221967 has 2 divisors, whose sum is σ = 2111221968. Its totient is φ = 2111221966.

The previous prime is 2111221951. The next prime is 2111221969. The reversal of 2111221967 is 7691221112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111221967 - 2⁴ = 2111221951 is a prime.

Together with 2111221969, 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 (2111221969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055610983 + 1055610984.

It is an arithmetic number, because the mean of its divisors is an integer number (1055610984).

Almost surely, 2^2111221967 is an apocalyptic number.

2111221967 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111221967 is an equidigital number, since it uses as much as digits as its factorization.

2111221967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 2111221967 is about 45948.0355075165. The cubic root of 2111221967 is about 1282.8561641912.

The spelling of 2111221967 in words is "two billion, one hundred eleven million, two hundred twenty-one thousand, nine hundred sixty-seven".