2112121087 has 2 divisors, whose sum is σ = 2112121088. Its totient is φ = 2112121086.

The previous prime is 2112121049. The next prime is 2112121091. The reversal of 2112121087 is 7801212112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2112121087 - 2²⁷ = 1977903359 is a prime.

It is a super-2 number, since 2×2112121087² = 8922110972300123138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112121007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056060543 + 1056060544.

It is an arithmetic number, because the mean of its divisors is an integer number (1056060544).

Almost surely, 2^2112121087 is an apocalyptic number.

2112121087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112121087 is an equidigital number, since it uses as much as digits as its factorization.

2112121087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 2112121087 is about 45957.8185622425. The cubic root of 2112121087 is about 1283.0382511452.

Adding to 2112121087 its reverse (7801212112), we get a palindrome (9913333199).

The spelling of 2112121087 in words is "two billion, one hundred twelve million, one hundred twenty-one thousand, eighty-seven".