21322122122087 has 2 divisors, whose sum is σ = 21322122122088. Its totient is φ = 21322122122086.

The previous prime is 21322122122083. The next prime is 21322122122177. The reversal of 21322122122087 is 78022122122312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21322122122087 - 2² = 21322122122083 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21322122122083) 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, 10661061061043 + 10661061061044.

It is an arithmetic number, because the mean of its divisors is an integer number (10661061061044).

Almost surely, 2^{21322122122087} is an apocalyptic number.

21322122122087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21322122122087 is an equidigital number, since it uses as much as digits as its factorization.

21322122122087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 35.

Adding to 21322122122087 its reverse (78022122122312), we get a palindrome (99344244244399).

The spelling of 21322122122087 in words is "twenty-one trillion, three hundred twenty-two billion, one hundred twenty-two million, one hundred twenty-two thousand, eighty-seven".