2123221229 has 2 divisors, whose sum is σ = 2123221230. Its totient is φ = 2123221228.

The previous prime is 2123221213. The next prime is 2123221231. The reversal of 2123221229 is 9221223212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1562620900 + 560600329 = 39530^2 + 23677^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123221229 - 2⁴ = 2123221213 is a prime.

Together with 2123221231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2123221198 and 2123221207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123221249) 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, 1061610614 + 1061610615.

It is an arithmetic number, because the mean of its divisors is an integer number (1061610615).

Almost surely, 2^2123221229 is an apocalyptic number.

It is an amenable number.

2123221229 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123221229 is an equidigital number, since it uses as much as digits as its factorization.

2123221229 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2123221229 is about 46078.4247669123. The cubic root of 2123221229 is about 1285.2819719650.

The spelling of 2123221229 in words is "two billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred twenty-nine".