22021212113 has 2 divisors, whose sum is σ = 22021212114. Its totient is φ = 22021212112.

The previous prime is 22021212011. The next prime is 22021212119. The reversal of 22021212113 is 31121212022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19888896784 + 2132315329 = 141028^2 + 46177^2 .

It is a cyclic number.

It is not a de Polignac number, because 22021212113 - 2¹² = 22021208017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22021212091 and 22021212100.

It is not a weakly prime, because it can be changed into another prime (22021212119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010606056 + 11010606057.

It is an arithmetic number, because the mean of its divisors is an integer number (11010606057).

Almost surely, 2^22021212113 is an apocalyptic number.

It is an amenable number.

22021212113 is a deficient number, since it is larger than the sum of its proper divisors (1).

22021212113 is an equidigital number, since it uses as much as digits as its factorization.

22021212113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 22021212113 its reverse (31121212022), we get a palindrome (53142424135).

Subtracting 22021212113 from its reverse (31121212022), we obtain a palindrome (9099999909).

The spelling of 22021212113 in words is "twenty-two billion, twenty-one million, two hundred twelve thousand, one hundred thirteen".