21102111113107 has 2 divisors, whose sum is σ = 21102111113108. Its totient is φ = 21102111113106.

The previous prime is 21102111113081. The next prime is 21102111113119. The reversal of 21102111113107 is 70131111120112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102111113107 is a prime.

It is not a weakly prime, because it can be changed into another prime (21102111113147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551055556553 + 10551055556554.

It is an arithmetic number, because the mean of its divisors is an integer number (10551055556554).

Almost surely, 2^{21102111113107} is an apocalyptic number.

21102111113107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102111113107 is an equidigital number, since it uses as much as digits as its factorization.

21102111113107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 22.

Adding to 21102111113107 its reverse (70131111120112), we get a palindrome (91233222233219).

The spelling of 21102111113107 in words is "twenty-one trillion, one hundred two billion, one hundred eleven million, one hundred thirteen thousand, one hundred seven".