21102122010107 has 2 divisors, whose sum is σ = 21102122010108. Its totient is φ = 21102122010106.

The previous prime is 21102122010049. The next prime is 21102122010163. The reversal of 21102122010107 is 70101022120112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102122010107 - 2²⁰ = 21102120961531 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102122010187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551061005053 + 10551061005054.

It is an arithmetic number, because the mean of its divisors is an integer number (10551061005054).

Almost surely, 2^{21102122010107} is an apocalyptic number.

21102122010107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102122010107 is an equidigital number, since it uses as much as digits as its factorization.

21102122010107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 21102122010107 its reverse (70101022120112), we get a palindrome (91203144130219).

The spelling of 21102122010107 in words is "twenty-one trillion, one hundred two billion, one hundred twenty-two million, ten thousand, one hundred seven".