21103134202459 has 2 divisors, whose sum is σ = 21103134202460. Its totient is φ = 21103134202458.

The previous prime is 21103134202441. The next prime is 21103134202481. The reversal of 21103134202459 is 95420243130112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21103134202459 - 2¹⁹ = 21103133678171 is a prime.

It is not a weakly prime, because it can be changed into another prime (21103134202159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551567101229 + 10551567101230.

It is an arithmetic number, because the mean of its divisors is an integer number (10551567101230).

Almost surely, 2^{21103134202459} is an apocalyptic number.

21103134202459 is a deficient number, since it is larger than the sum of its proper divisors (1).

21103134202459 is an equidigital number, since it uses as much as digits as its factorization.

21103134202459 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The spelling of 21103134202459 in words is "twenty-one trillion, one hundred three billion, one hundred thirty-four million, two hundred two thousand, four hundred fifty-nine".