20221231229 has 2 divisors, whose sum is σ = 20221231230. Its totient is φ = 20221231228.

The previous prime is 20221231193. The next prime is 20221231249. The reversal of 20221231229 is 92213212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20189568100 + 31663129 = 142090^2 + 5627^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221231229 - 2²⁴ = 20204454013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20221231198 and 20221231207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20221231249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110615614 + 10110615615.

It is an arithmetic number, because the mean of its divisors is an integer number (10110615615).

Almost surely, 2^20221231229 is an apocalyptic number.

It is an amenable number.

20221231229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221231229 is an equidigital number, since it uses as much as digits as its factorization.

20221231229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 20221231229 in words is "twenty billion, two hundred twenty-one million, two hundred thirty-one thousand, two hundred twenty-nine".