21003002223 has 16 divisors (see below), whose sum is σ = 33887197440. Its totient is φ = 11295732096.

The previous prime is 21003002213. The next prime is 21003002239. The reversal of 21003002223 is 32220030012.

It is not a de Polignac number, because 21003002223 - 2⁸ = 21003001967 is a prime.

It is a super-2 number, since 2×21003002223² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21003002213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29415613 + ... + 29416326.

It is an arithmetic number, because the mean of its divisors is an integer number (2117949840).

Almost surely, 2^21003002223 is an apocalyptic number.

21003002223 is a deficient number, since it is larger than the sum of its proper divisors (12884195217).

21003002223 is a wasteful number, since it uses less digits than its factorization.

21003002223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58831966.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21003002223 its reverse (32220030012), we get a palindrome (53223032235).

The spelling of 21003002223 in words is "twenty-one billion, three million, two thousand, two hundred twenty-three".