1323121229 has 2 divisors, whose sum is σ = 1323121230. Its totient is φ = 1323121228.

The previous prime is 1323121213. The next prime is 1323121231. The reversal of 1323121229 is 9221213231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1321686025 + 1435204 = 36355^2 + 1198^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323121229 - 2⁴ = 1323121213 is a prime.

Together with 1323121231, 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 = 1323121198 and 1323121207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1323121249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661560614 + 661560615.

It is an arithmetic number, because the mean of its divisors is an integer number (661560615).

Almost surely, 2^1323121229 is an apocalyptic number.

It is an amenable number.

1323121229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1323121229 is an equidigital number, since it uses as much as digits as its factorization.

1323121229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

The square root of 1323121229 is about 36374.7333873391. The cubic root of 1323121229 is about 1097.8252428952.

The spelling of 1323121229 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, two hundred twenty-nine".