21226561003 has 8 divisors (see below), whose sum is σ = 21704042016. Its totient is φ = 20751931200.

The previous prime is 21226561001. The next prime is 21226561129. The reversal of 21226561003 is 30016562212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21226561003 - 2¹ = 21226561001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21226561001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 697743 + ... + 727528.

It is an arithmetic number, because the mean of its divisors is an integer number (2713005252).

Almost surely, 2^21226561003 is an apocalyptic number.

21226561003 is a deficient number, since it is larger than the sum of its proper divisors (477481013).

21226561003 is a wasteful number, since it uses less digits than its factorization.

21226561003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425605.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 21226561003 in words is "twenty-one billion, two hundred twenty-six million, five hundred sixty-one thousand, three".