22431222021 has 48 divisors (see below), whose sum is σ = 33315920064. Its totient is φ = 13343102976.

The previous prime is 22431222019. The next prime is 22431222031. The reversal of 22431222021 is 12022213422.

It is not a de Polignac number, because 22431222021 - 2¹ = 22431222019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431222031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7148965 + ... + 7152101.

It is an arithmetic number, because the mean of its divisors is an integer number (694081668).

Almost surely, 2^22431222021 is an apocalyptic number.

It is an amenable number.

22431222021 is a deficient number, since it is larger than the sum of its proper divisors (10884698043).

22431222021 is a wasteful number, since it uses less digits than its factorization.

22431222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330 (or 3283 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 22431222021 its reverse (12022213422), we get a palindrome (34453435443).

The spelling of 22431222021 in words is "twenty-two billion, four hundred thirty-one million, two hundred twenty-two thousand, twenty-one".