21202100003 has 8 divisors (see below), whose sum is σ = 24239200608. Its totient is φ = 18167056704.

The previous prime is 21202099987. The next prime is 21202100033. The reversal of 21202100003 is 30000120212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21202100003 - 2⁴ = 21202099987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21202100033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492176 + ... + 533517.

It is an arithmetic number, because the mean of its divisors is an integer number (3029900076).

Almost surely, 2^21202100003 is an apocalyptic number.

21202100003 is a deficient number, since it is larger than the sum of its proper divisors (3037100605).

21202100003 is a wasteful number, since it uses less digits than its factorization.

21202100003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028653.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 21202100003 its reverse (30000120212), we get a palindrome (51202220215).

The spelling of 21202100003 in words is "twenty-one billion, two hundred two million, one hundred thousand, three".