22333300021 has 2 divisors, whose sum is σ = 22333300022. Its totient is φ = 22333300020.

The previous prime is 22333300019. The next prime is 22333300037. The reversal of 22333300021 is 12000333322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16153139025 + 6180160996 = 127095^2 + 78614^2 .

It is a cyclic number.

It is not a de Polignac number, because 22333300021 - 2¹ = 22333300019 is a prime.

Together with 22333300019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22333300721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11166650010 + 11166650011.

It is an arithmetic number, because the mean of its divisors is an integer number (11166650011).

Almost surely, 2^22333300021 is an apocalyptic number.

It is an amenable number.

22333300021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22333300021 is an equidigital number, since it uses as much as digits as its factorization.

22333300021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 22333300021 its reverse (12000333322), we get a palindrome (34333633343).

The spelling of 22333300021 in words is "twenty-two billion, three hundred thirty-three million, three hundred thousand, twenty-one".