21110102579 has 2 divisors, whose sum is σ = 21110102580. Its totient is φ = 21110102578.

The previous prime is 21110102561. The next prime is 21110102621. The reversal of 21110102579 is 97520101112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110102579 - 2³² = 16815135283 is a prime.

It is not a weakly prime, because it can be changed into another prime (21110102539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555051289 + 10555051290.

It is an arithmetic number, because the mean of its divisors is an integer number (10555051290).

Almost surely, 2^21110102579 is an apocalyptic number.

21110102579 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110102579 is an equidigital number, since it uses as much as digits as its factorization.

21110102579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 29.

The spelling of 21110102579 in words is "twenty-one billion, one hundred ten million, one hundred two thousand, five hundred seventy-nine".