21226515464203 has 6 divisors (see below), whose sum is σ = 24692069009436. Its totient is φ = 18194156112132.

The previous prime is 21226515464171. The next prime is 21226515464221. The reversal of 21226515464203 is 30246451562212.

It is not a de Polignac number, because 21226515464203 - 2⁵ = 21226515464171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21226515464203.

It is not an unprimeable number, because it can be changed into a prime (21226515464243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216597096525 + ... + 216597096622.

It is an arithmetic number, because the mean of its divisors is an integer number (4115344834906).

Almost surely, 2^{21226515464203} is an apocalyptic number.

21226515464203 is a deficient number, since it is larger than the sum of its proper divisors (3465553545233).

21226515464203 is an equidigital number, since it uses as much as digits as its factorization.

21226515464203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433194193161 (or 433194193154 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 21226515464203 in words is "twenty-one trillion, two hundred twenty-six billion, five hundred fifteen million, four hundred sixty-four thousand, two hundred three".