22012320421 has 24 divisors (see below), whose sum is σ = 28162632960. Its totient is φ = 17045757792.

The previous prime is 22012320359. The next prime is 22012320431. The reversal of 22012320421 is 12402321022.

It is not a de Polignac number, because 22012320421 - 2⁷ = 22012320293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012320431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 337681 + ... + 397558.

It is an arithmetic number, because the mean of its divisors is an integer number (1173443040).

Almost surely, 2^22012320421 is an apocalyptic number.

It is an amenable number.

22012320421 is a deficient number, since it is larger than the sum of its proper divisors (6150312539).

22012320421 is a wasteful number, since it uses less digits than its factorization.

22012320421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735313 (or 735306 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 22012320421 its reverse (12402321022), we get a palindrome (34414641443).

The spelling of 22012320421 in words is "twenty-two billion, twelve million, three hundred twenty thousand, four hundred twenty-one".