21214204003 has 4 divisors (see below), whose sum is σ = 21221807728. Its totient is φ = 21206600280.

The previous prime is 21214203979. The next prime is 21214204009. The reversal of 21214204003 is 30040241212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21214204003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21214204009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3797676 + ... + 3803257.

It is an arithmetic number, because the mean of its divisors is an integer number (5305451932).

Almost surely, 2^21214204003 is an apocalyptic number.

21214204003 is a deficient number, since it is larger than the sum of its proper divisors (7603725).

21214204003 is an equidigital number, since it uses as much as digits as its factorization.

21214204003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7603724.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21214204003 its reverse (30040241212), we get a palindrome (51254445215).

The spelling of 21214204003 in words is "twenty-one billion, two hundred fourteen million, two hundred four thousand, three".