22430312221 has 4 divisors (see below), whose sum is σ = 22442936572. Its totient is φ = 22417687872.

The previous prime is 22430312213. The next prime is 22430312243. The reversal of 22430312221 is 12221303422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12221303422 = 2 ⋅6110651711.

It can be written as a sum of positive squares in 2 ways, for example, as 16870372996 + 5559939225 = 129886^2 + 74565^2 .

It is a cyclic number.

It is not a de Polignac number, because 22430312221 - 2³ = 22430312213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22430312192 and 22430312201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22430312321) 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, 6309510 + ... + 6313063.

It is an arithmetic number, because the mean of its divisors is an integer number (5610734143).

Almost surely, 2^22430312221 is an apocalyptic number.

It is an amenable number.

22430312221 is a deficient number, since it is larger than the sum of its proper divisors (12624351).

22430312221 is a wasteful number, since it uses less digits than its factorization.

22430312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12624350.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 22430312221 its reverse (12221303422), we get a palindrome (34651615643).

The spelling of 22430312221 in words is "twenty-two billion, four hundred thirty million, three hundred twelve thousand, two hundred twenty-one".