2121040087 has 2 divisors, whose sum is σ = 2121040088. Its totient is φ = 2121040086.

The previous prime is 2121040069. The next prime is 2121040099. The reversal of 2121040087 is 7800401212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121040087 - 2⁷ = 2121039959 is a prime.

It is a super-2 number, since 2×2121040087² = 8997622101321935138, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121040027) 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, 1060520043 + 1060520044.

It is an arithmetic number, because the mean of its divisors is an integer number (1060520044).

Almost surely, 2^2121040087 is an apocalyptic number.

2121040087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121040087 is an equidigital number, since it uses as much as digits as its factorization.

2121040087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 2121040087 is about 46054.7509709910. The cubic root of 2121040087 is about 1284.8417064926.

Adding to 2121040087 its reverse (7800401212), we get a palindrome (9921441299).

The spelling of 2121040087 in words is "two billion, one hundred twenty-one million, forty thousand, eighty-seven".