21110222002087 has 2 divisors, whose sum is σ = 21110222002088. Its totient is φ = 21110222002086.

The previous prime is 21110222002073. The next prime is 21110222002139. The reversal of 21110222002087 is 78020022201112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21110222002087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110222002487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555111001043 + 10555111001044.

It is an arithmetic number, because the mean of its divisors is an integer number (10555111001044).

Almost surely, 2^{21110222002087} is an apocalyptic number.

21110222002087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110222002087 is an equidigital number, since it uses as much as digits as its factorization.

21110222002087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 28.

Adding to 21110222002087 its reverse (78020022201112), we get a palindrome (99130244203199).

The spelling of 21110222002087 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty-two million, two thousand, eighty-seven".