22002045421 has 2 divisors, whose sum is σ = 22002045422. Its totient is φ = 22002045420.

The previous prime is 22002045419. The next prime is 22002045487. The reversal of 22002045421 is 12454020022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19744465225 + 2257580196 = 140515^2 + 47514^2 .

It is a cyclic number.

It is not a de Polignac number, because 22002045421 - 2¹ = 22002045419 is a prime.

Together with 22002045419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22002045392 and 22002045401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22002015421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001022710 + 11001022711.

It is an arithmetic number, because the mean of its divisors is an integer number (11001022711).

Almost surely, 2^22002045421 is an apocalyptic number.

It is an amenable number.

22002045421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22002045421 is an equidigital number, since it uses as much as digits as its factorization.

22002045421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 22002045421 its reverse (12454020022), we get a palindrome (34456065443).

The spelling of 22002045421 in words is "twenty-two billion, two million, forty-five thousand, four hundred twenty-one".