22143030021 has 80 divisors (see below), whose sum is σ = 39412251648. Its totient is φ = 12122784000.

The previous prime is 22143030017. The next prime is 22143030031. The reversal of 22143030021 is 12003034122.

It is not a de Polignac number, because 22143030021 - 2² = 22143030017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22143029976 and 22143030003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143030031) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1769041 + ... + 1781513.

Almost surely, 2^22143030021 is an apocalyptic number.

22143030021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22143030021 is a deficient number, since it is larger than the sum of its proper divisors (17269221627).

22143030021 is a wasteful number, since it uses less digits than its factorization.

22143030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12624 (or 12615 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 22143030021 its reverse (12003034122), we get a palindrome (34146064143).

The spelling of 22143030021 in words is "twenty-two billion, one hundred forty-three million, thirty thousand, twenty-one".