21133221003 has 40 divisors (see below), whose sum is σ = 32122276560. Its totient is φ = 13843146240.

The previous prime is 21133220993. The next prime is 21133221013. The reversal of 21133221003 is 30012233112.

It is an interprime number because it is at equal distance from previous prime (21133220993) and next prime (21133221013).

It is not a de Polignac number, because 21133221003 - 2²¹ = 21131123851 is a prime.

It is a super-2 number, since 2×21133221003² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21133221013) 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 39 ways as a sum of consecutive naturals, for example, 2214883 + ... + 2224403.

It is an arithmetic number, because the mean of its divisors is an integer number (803056914).

Almost surely, 2^21133221003 is an apocalyptic number.

21133221003 is a deficient number, since it is larger than the sum of its proper divisors (10989055557).

21133221003 is an equidigital number, since it uses as much as digits as its factorization.

21133221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10009 (or 10000 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21133221003 its reverse (30012233112), we get a palindrome (51145454115).

The spelling of 21133221003 in words is "twenty-one billion, one hundred thirty-three million, two hundred twenty-one thousand, three".