21202112003 has 16 divisors (see below), whose sum is σ = 23026296384. Its totient is φ = 19443287040.

The previous prime is 21202111999. The next prime is 21202112051. The reversal of 21202112003 is 30021120212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21202112003 - 2² = 21202111999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202112083) 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, 536426 + ... + 574592.

It is an arithmetic number, because the mean of its divisors is an integer number (1439143524).

Almost surely, 2^21202112003 is an apocalyptic number.

21202112003 is a deficient number, since it is larger than the sum of its proper divisors (1824184381).

21202112003 is a wasteful number, since it uses less digits than its factorization.

21202112003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39022.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21202112003 its reverse (30021120212), we get a palindrome (51223232215).

The spelling of 21202112003 in words is "twenty-one billion, two hundred two million, one hundred twelve thousand, three".