22030401821 has 2 divisors, whose sum is σ = 22030401822. Its totient is φ = 22030401820.

The previous prime is 22030401797. The next prime is 22030401823. The reversal of 22030401821 is 12810403022.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22000305625 + 30096196 = 148325^2 + 5486^2 .

It is a cyclic number.

It is not a de Polignac number, because 22030401821 - 2¹⁴ = 22030385437 is a prime.

Together with 22030401823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22030401823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11015200910 + 11015200911.

It is an arithmetic number, because the mean of its divisors is an integer number (11015200911).

Almost surely, 2^22030401821 is an apocalyptic number.

It is an amenable number.

22030401821 is a deficient number, since it is larger than the sum of its proper divisors (1).

22030401821 is an equidigital number, since it uses as much as digits as its factorization.

22030401821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 22030401821 its reverse (12810403022), we get a palindrome (34840804843).

The spelling of 22030401821 in words is "twenty-two billion, thirty million, four hundred one thousand, eight hundred twenty-one".