22224020421 has 16 divisors (see below), whose sum is σ = 29986772480. Its totient is φ = 14639652720.

The previous prime is 22224020419. The next prime is 22224020459. The reversal of 22224020421 is 12402042222.

It is not a de Polignac number, because 22224020421 - 2¹ = 22224020419 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224720421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38305 + ... + 214278.

It is an arithmetic number, because the mean of its divisors is an integer number (1874173280).

Almost surely, 2^22224020421 is an apocalyptic number.

It is an amenable number.

22224020421 is a deficient number, since it is larger than the sum of its proper divisors (7762752059).

22224020421 is a wasteful number, since it uses less digits than its factorization.

22224020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252936.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 22224020421 its reverse (12402042222), we get a palindrome (34626062643).

The spelling of 22224020421 in words is "twenty-two billion, two hundred twenty-four million, twenty thousand, four hundred twenty-one".