21102122291011 has 2 divisors, whose sum is σ = 21102122291012. Its totient is φ = 21102122291010.

The previous prime is 21102122290957. The next prime is 21102122291039. The reversal of 21102122291011 is 11019222120112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102122291011 - 2²⁵ = 21102088736579 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102122291071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551061145505 + 10551061145506.

It is an arithmetic number, because the mean of its divisors is an integer number (10551061145506).

Almost surely, 2^{21102122291011} is an apocalyptic number.

21102122291011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102122291011 is an equidigital number, since it uses as much as digits as its factorization.

21102122291011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 21102122291011 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, two hundred ninety-one thousand, eleven".