22021103213 has 2 divisors, whose sum is σ = 22021103214. Its totient is φ = 22021103212.

The previous prime is 22021103191. The next prime is 22021103219. The reversal of 22021103213 is 31230112022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21827698564 + 193404649 = 147742^2 + 13907^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021103213 - 2²⁴ = 22004325997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021103191 and 22021103200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22021103219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010551606 + 11010551607.

It is an arithmetic number, because the mean of its divisors is an integer number (11010551607).

Almost surely, 2^22021103213 is an apocalyptic number.

It is an amenable number.

22021103213 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021103213 is an equidigital number, since it uses as much as digits as its factorization.

22021103213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 22021103213 its reverse (31230112022), we get a palindrome (53251215235).

The spelling of 22021103213 in words is "twenty-two billion, twenty-one million, one hundred three thousand, two hundred thirteen".