21213030203 has 8 divisors (see below), whose sum is σ = 22331226528. Its totient is φ = 20111158144.

The previous prime is 21213030193. The next prime is 21213030227. The reversal of 21213030203 is 30203031212.

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 21213030203 - 2¹⁰ = 21213029179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213030283) 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, 4078400 + ... + 4083597.

It is an arithmetic number, because the mean of its divisors is an integer number (2791403316).

Almost surely, 2^21213030203 is an apocalyptic number.

21213030203 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21213030203 is a deficient number, since it is larger than the sum of its proper divisors (1118196325).

21213030203 is a wasteful number, since it uses less digits than its factorization.

21213030203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8162133.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21213030203 its reverse (30203031212), we get a palindrome (51416061415).

The spelling of 21213030203 in words is "twenty-one billion, two hundred thirteen million, thirty thousand, two hundred three".