21230031203 has 8 divisors (see below), whose sum is σ = 21327515136. Its totient is φ = 21132771400.

The previous prime is 21230031187. The next prime is 21230031233. The reversal of 21230031203 is 30213003212.

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 21230031203 - 2⁴ = 21230031187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21230031233) 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, 135338 + ... + 246528.

It is an arithmetic number, because the mean of its divisors is an integer number (2665939392).

Almost surely, 2^21230031203 is an apocalyptic number.

21230031203 is a deficient number, since it is larger than the sum of its proper divisors (97483933).

21230031203 is a wasteful number, since it uses less digits than its factorization.

21230031203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112065.

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

Adding to 21230031203 its reverse (30213003212), we get a palindrome (51443034415).

The spelling of 21230031203 in words is "twenty-one billion, two hundred thirty million, thirty-one thousand, two hundred three".