21122210102087 has 2 divisors, whose sum is σ = 21122210102088. Its totient is φ = 21122210102086.

The previous prime is 21122210101987. The next prime is 21122210102113. The reversal of 21122210102087 is 78020101222112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21122210102087 - 2¹² = 21122210097991 is a prime.

It is a super-2 number, since 2×21122210102087² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21122210302087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10561105051043 + 10561105051044.

It is an arithmetic number, because the mean of its divisors is an integer number (10561105051044).

Almost surely, 2^{21122210102087} is an apocalyptic number.

21122210102087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21122210102087 is an equidigital number, since it uses as much as digits as its factorization.

21122210102087 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 29.

Adding to 21122210102087 its reverse (78020101222112), we get a palindrome (99142311324199).

The spelling of 21122210102087 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred ten million, one hundred two thousand, eighty-seven".