21230103033 has 12 divisors (see below), whose sum is σ = 30668125540. Its totient is φ = 14152284576.

The previous prime is 21230103029. The next prime is 21230103043. The reversal of 21230103033 is 33030103212.

It can be written as a sum of positive squares in 2 ways, for example, as 10999185129 + 10230917904 = 104877^2 + 101148^2 .

It is not a de Polignac number, because 21230103033 - 2² = 21230103029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21230102997 and 21230103015.

It is not an unprimeable number, because it can be changed into a prime (21230103043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36735 + ... + 209307.

Almost surely, 2^21230103033 is an apocalyptic number.

It is an amenable number.

21230103033 is a deficient number, since it is larger than the sum of its proper divisors (9438022507).

21230103033 is a wasteful number, since it uses less digits than its factorization.

21230103033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186248 (or 186245 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21230103033 its reverse (33030103212), we get a palindrome (54260206245).

The spelling of 21230103033 in words is "twenty-one billion, two hundred thirty million, one hundred three thousand, thirty-three".