21030210203 has 8 divisors (see below), whose sum is σ = 21326581056. Its totient is φ = 20735568000.

The previous prime is 21030210199. The next prime is 21030210259. The reversal of 21030210203 is 30201203012.

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 21030210203 - 2² = 21030210199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21030210703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 407651 + ... + 456332.

It is an arithmetic number, because the mean of its divisors is an integer number (2665822632).

Almost surely, 2^21030210203 is an apocalyptic number.

21030210203 is a deficient number, since it is larger than the sum of its proper divisors (296370853).

21030210203 is a wasteful number, since it uses less digits than its factorization.

21030210203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864325.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21030210203 its reverse (30201203012), we get a palindrome (51231413215).

The spelling of 21030210203 in words is "twenty-one billion, thirty million, two hundred ten thousand, two hundred three".