21210101111107 has 2 divisors, whose sum is σ = 21210101111108. Its totient is φ = 21210101111106.

The previous prime is 21210101111093. The next prime is 21210101111113. The reversal of 21210101111107 is 70111110101212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210101111107 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210101111137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605050555553 + 10605050555554.

It is an arithmetic number, because the mean of its divisors is an integer number (10605050555554).

Almost surely, 2^{21210101111107} is an apocalyptic number.

21210101111107 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210101111107 is an equidigital number, since it uses as much as digits as its factorization.

21210101111107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 19.

Adding to 21210101111107 its reverse (70111110101212), we get a palindrome (91321211212319).

The spelling of 21210101111107 in words is "twenty-one trillion, two hundred ten billion, one hundred one million, one hundred eleven thousand, one hundred seven".