20221221113 has 2 divisors, whose sum is σ = 20221221114. Its totient is φ = 20221221112.

The previous prime is 20221221103. The next prime is 20221221173. The reversal of 20221221113 is 31112212202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19302100624 + 919120489 = 138932^2 + 30317^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221221113 - 2⁶ = 20221221049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20221221091 and 20221221100.

It is not a weakly prime, because it can be changed into another prime (20221221103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110610556 + 10110610557.

It is an arithmetic number, because the mean of its divisors is an integer number (10110610557).

Almost surely, 2^20221221113 is an apocalyptic number.

It is an amenable number.

20221221113 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221221113 is an equidigital number, since it uses as much as digits as its factorization.

20221221113 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 20221221113 its reverse (31112212202), we get a palindrome (51333433315).

The spelling of 20221221113 in words is "twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred thirteen".