22221134021 has 2 divisors, whose sum is σ = 22221134022. Its totient is φ = 22221134020.

The previous prime is 22221134017. The next prime is 22221134041. The reversal of 22221134021 is 12043112222.

It is an a-pointer prime, because the next prime (22221134041) can be obtained adding 22221134021 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17401303396 + 4819830625 = 131914^2 + 69425^2 .

It is a cyclic number.

It is not a de Polignac number, because 22221134021 - 2² = 22221134017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22221133984 and 22221134002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22221134041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110567010 + 11110567011.

It is an arithmetic number, because the mean of its divisors is an integer number (11110567011).

Almost surely, 2^22221134021 is an apocalyptic number.

It is an amenable number.

22221134021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22221134021 is an equidigital number, since it uses as much as digits as its factorization.

22221134021 is an evil number, because the sum of its binary digits is even.

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

Adding to 22221134021 its reverse (12043112222), we get a palindrome (34264246243).

The spelling of 22221134021 in words is "twenty-two billion, two hundred twenty-one million, one hundred thirty-four thousand, twenty-one".