21223003203 has 24 divisors (see below), whose sum is σ = 30856370688. Its totient is φ = 14056230912.

The previous prime is 21223003199. The next prime is 21223003231. The reversal of 21223003203 is 30230032212.

It is a happy number.

21223003203 is a `hidden beast` number, since 21 + 22 + 300 + 320 + 3 = 666.

It is not a de Polignac number, because 21223003203 - 2² = 21223003199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21223003603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 873901 + ... + 897857.

It is an arithmetic number, because the mean of its divisors is an integer number (1285682112).

Almost surely, 2^21223003203 is an apocalyptic number.

21223003203 is a deficient number, since it is larger than the sum of its proper divisors (9633367485).

21223003203 is a wasteful number, since it uses less digits than its factorization.

21223003203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24603 (or 24600 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21223003203 its reverse (30230032212), we get a palindrome (51453035415).

The spelling of 21223003203 in words is "twenty-one billion, two hundred twenty-three million, three thousand, two hundred three".