21222210100087 has 2 divisors, whose sum is σ = 21222210100088. Its totient is φ = 21222210100086.

The previous prime is 21222210100031. The next prime is 21222210100151. The reversal of 21222210100087 is 78000101222212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222210100087 - 2³¹ = 21220062616439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222210100387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611105050043 + 10611105050044.

It is an arithmetic number, because the mean of its divisors is an integer number (10611105050044).

Almost surely, 2^{21222210100087} is an apocalyptic number.

21222210100087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222210100087 is an equidigital number, since it uses as much as digits as its factorization.

21222210100087 is an evil number, because the sum of its binary digits is even.

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

Adding to 21222210100087 its reverse (78000101222212), we get a palindrome (99222311322299).

The spelling of 21222210100087 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred ten million, one hundred thousand, eighty-seven".