21222211022087 has 2 divisors, whose sum is σ = 21222211022088. Its totient is φ = 21222211022086.

The previous prime is 21222211021997. The next prime is 21222211022099. The reversal of 21222211022087 is 78022011222212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21222211022087 - 2¹² = 21222211017991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222211012087) 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, 10611105511043 + 10611105511044.

It is an arithmetic number, because the mean of its divisors is an integer number (10611105511044).

Almost surely, 2^{21222211022087} is an apocalyptic number.

21222211022087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222211022087 is an equidigital number, since it uses as much as digits as its factorization.

21222211022087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

Adding to 21222211022087 its reverse (78022011222212), we get a palindrome (99244222244299).

The spelling of 21222211022087 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, twenty-two thousand, eighty-seven".