21110101110919 has 2 divisors, whose sum is σ = 21110101110920. Its totient is φ = 21110101110918.

The previous prime is 21110101110907. The next prime is 21110101111019. The reversal of 21110101110919 is 91901110101112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110101110919 - 2³³ = 21101511176327 is a prime.

It is a super-2 number, since 2×21110101110919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110101110419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555050555459 + 10555050555460.

It is an arithmetic number, because the mean of its divisors is an integer number (10555050555460).

Almost surely, 2^{21110101110919} is an apocalyptic number.

21110101110919 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110101110919 is an equidigital number, since it uses as much as digits as its factorization.

21110101110919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 28.

The spelling of 21110101110919 in words is "twenty-one trillion, one hundred ten billion, one hundred one million, one hundred ten thousand, nine hundred nineteen".