22103020021 has 2 divisors, whose sum is σ = 22103020022. Its totient is φ = 22103020020.

The previous prime is 22103019959. The next prime is 22103020031. The reversal of 22103020021 is 12002030122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14964628900 + 7138391121 = 122330^2 + 84489^2 .

It is a cyclic number.

It is not a de Polignac number, because 22103020021 - 2¹¹ = 22103017973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22103019983 and 22103020010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22103020031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11051510010 + 11051510011.

It is an arithmetic number, because the mean of its divisors is an integer number (11051510011).

Almost surely, 2^22103020021 is an apocalyptic number.

It is an amenable number.

22103020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22103020021 is an equidigital number, since it uses as much as digits as its factorization.

22103020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 22103020021 its reverse (12002030122), we get a palindrome (34105050143).

The spelling of 22103020021 in words is "twenty-two billion, one hundred three million, twenty thousand, twenty-one".