21022312003 has 16 divisors (see below), whose sum is σ = 26469146880. Its totient is φ = 16218828000.

The previous prime is 21022311977. The next prime is 21022312009. The reversal of 21022312003 is 30021322012.

It is a cyclic number.

It is not a de Polignac number, because 21022312003 - 2⁹ = 21022311491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21022312009) 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, 1343793 + ... + 1359346.

It is an arithmetic number, because the mean of its divisors is an integer number (1654321680).

Almost surely, 2^21022312003 is an apocalyptic number.

21022312003 is a deficient number, since it is larger than the sum of its proper divisors (5446834877).

21022312003 is a wasteful number, since it uses less digits than its factorization.

21022312003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2703258.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21022312003 its reverse (30021322012), we get a palindrome (51043634015).

The spelling of 21022312003 in words is "twenty-one billion, twenty-two million, three hundred twelve thousand, three".