21102321022187 has 2 divisors, whose sum is σ = 21102321022188. Its totient is φ = 21102321022186.

The previous prime is 21102321022157. The next prime is 21102321022201. The reversal of 21102321022187 is 78122012320112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102321022187 - 2¹⁴ = 21102321005803 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102321022157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551160511093 + 10551160511094.

It is an arithmetic number, because the mean of its divisors is an integer number (10551160511094).

Almost surely, 2^{21102321022187} is an apocalyptic number.

21102321022187 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102321022187 is an equidigital number, since it uses as much as digits as its factorization.

21102321022187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 32.

Adding to 21102321022187 its reverse (78122012320112), we get a palindrome (99224333342299).

The spelling of 21102321022187 in words is "twenty-one trillion, one hundred two billion, three hundred twenty-one million, twenty-two thousand, one hundred eighty-seven".