21110515367 has 2 divisors, whose sum is σ = 21110515368. Its totient is φ = 21110515366.

The previous prime is 21110515351. The next prime is 21110515369. The reversal of 21110515367 is 76351501112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21110515367 - 2⁴ = 21110515351 is a prime.

Together with 21110515369, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21110515369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555257683 + 10555257684.

It is an arithmetic number, because the mean of its divisors is an integer number (10555257684).

Almost surely, 2^21110515367 is an apocalyptic number.

21110515367 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110515367 is an equidigital number, since it uses as much as digits as its factorization.

21110515367 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 32.

The spelling of 21110515367 in words is "twenty-one billion, one hundred ten million, five hundred fifteen thousand, three hundred sixty-seven".