2121342287 has 2 divisors, whose sum is σ = 2121342288. Its totient is φ = 2121342286.

The previous prime is 2121342241. The next prime is 2121342319. The reversal of 2121342287 is 7822431212.

It is an a-pointer prime, because the next prime (2121342319) can be obtained adding 2121342287 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121342287 - 2²⁰ = 2120293711 is a prime.

It is a super-2 number, since 2×2121342287² = 9000186197228780738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121342787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060671143 + 1060671144.

It is an arithmetic number, because the mean of its divisors is an integer number (1060671144).

Almost surely, 2^2121342287 is an apocalyptic number.

2121342287 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121342287 is an equidigital number, since it uses as much as digits as its factorization.

2121342287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 32.

The square root of 2121342287 is about 46058.0317317186. The cubic root of 2121342287 is about 1284.9027238409.

Adding to 2121342287 its reverse (7822431212), we get a palindrome (9943773499).

The spelling of 2121342287 in words is "two billion, one hundred twenty-one million, three hundred forty-two thousand, two hundred eighty-seven".