22224131021 has 4 divisors (see below), whose sum is σ = 22226779200. Its totient is φ = 22221482844.

The previous prime is 22224130969. The next prime is 22224131053. The reversal of 22224131021 is 12013142222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22224131021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22224130984 and 22224131002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22224101021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1311461 + ... + 1328298.

It is an arithmetic number, because the mean of its divisors is an integer number (5556694800).

Almost surely, 2^22224131021 is an apocalyptic number.

It is an amenable number.

22224131021 is a deficient number, since it is larger than the sum of its proper divisors (2648179).

22224131021 is an equidigital number, since it uses as much as digits as its factorization.

22224131021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648178.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 22224131021 its reverse (12013142222), we get a palindrome (34237273243).

The spelling of 22224131021 in words is "twenty-two billion, two hundred twenty-four million, one hundred thirty-one thousand, twenty-one".