22002322021 has 2 divisors, whose sum is σ = 22002322022. Its totient is φ = 22002322020.

The previous prime is 22002322019. The next prime is 22002322037. The reversal of 22002322021 is 12022320022.

It is an a-pointer prime, because the next prime (22002322037) can be obtained adding 22002322021 to its sum of digits (16).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21465473121 + 536848900 = 146511^2 + 23170^2 .

It is a cyclic number.

It is not a de Polignac number, because 22002322021 - 2¹ = 22002322019 is a prime.

Together with 22002322019, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22002321986 and 22002322004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22002322081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11001161010 + 11001161011.

It is an arithmetic number, because the mean of its divisors is an integer number (11001161011).

Almost surely, 2^22002322021 is an apocalyptic number.

It is an amenable number.

22002322021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22002322021 is an equidigital number, since it uses as much as digits as its factorization.

22002322021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 22002322021 its reverse (12022320022), we get a palindrome (34024642043).

The spelling of 22002322021 in words is "twenty-two billion, two million, three hundred twenty-two thousand, twenty-one".