21260564501203 has 2 divisors, whose sum is σ = 21260564501204. Its totient is φ = 21260564501202.

The previous prime is 21260564501177. The next prime is 21260564501221. The reversal of 21260564501203 is 30210546506212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21260564501203 - 2²⁵ = 21260530946771 is a prime.

It is not a weakly prime, because it can be changed into another prime (21260561501203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630282250601 + 10630282250602.

It is an arithmetic number, because the mean of its divisors is an integer number (10630282250602).

Almost surely, 2^{21260564501203} is an apocalyptic number.

21260564501203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21260564501203 is an equidigital number, since it uses as much as digits as its factorization.

21260564501203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 21260564501203 in words is "twenty-one trillion, two hundred sixty billion, five hundred sixty-four million, five hundred one thousand, two hundred three".