2112121867 has 2 divisors, whose sum is σ = 2112121868. Its totient is φ = 2112121866.

The previous prime is 2112121849. The next prime is 2112121873. The reversal of 2112121867 is 7681212112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2112121867 - 2²³ = 2103733259 is a prime.

It is a super-2 number, since 2×2112121867² = 8922117562119131378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112121807) 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, 1056060933 + 1056060934.

It is an arithmetic number, because the mean of its divisors is an integer number (1056060934).

Almost surely, 2^2112121867 is an apocalyptic number.

2112121867 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112121867 is an equidigital number, since it uses as much as digits as its factorization.

2112121867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

The square root of 2112121867 is about 45957.8270482842. The cubic root of 2112121867 is about 1283.0384090860.

Adding to 2112121867 its reverse (7681212112), we get a palindrome (9793333979).

The spelling of 2112121867 in words is "two billion, one hundred twelve million, one hundred twenty-one thousand, eight hundred sixty-seven".