21113354364559 has 2 divisors, whose sum is σ = 21113354364560. Its totient is φ = 21113354364558.

The previous prime is 21113354364551. The next prime is 21113354364581. The reversal of 21113354364559 is 95546345331112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113354364559 - 2³ = 21113354364551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113354364551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556677182279 + 10556677182280.

It is an arithmetic number, because the mean of its divisors is an integer number (10556677182280).

Almost surely, 2^{21113354364559} is an apocalyptic number.

21113354364559 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113354364559 is an equidigital number, since it uses as much as digits as its factorization.

21113354364559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832000, while the sum is 52.

The spelling of 21113354364559 in words is "twenty-one trillion, one hundred thirteen billion, three hundred fifty-four million, three hundred sixty-four thousand, five hundred fifty-nine".