1211324369 has 2 divisors, whose sum is σ = 1211324370. Its totient is φ = 1211324368.

The previous prime is 1211324363. The next prime is 1211324407. The reversal of 1211324369 is 9634231121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982195600 + 229128769 = 31340^2 + 15137^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211324369 - 2²⁰ = 1210275793 is a prime.

It is a super-2 number, since 2×1211324369² = 2934613453866496322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1211324363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605662184 + 605662185.

It is an arithmetic number, because the mean of its divisors is an integer number (605662185).

Almost surely, 2^1211324369 is an apocalyptic number.

It is an amenable number.

1211324369 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211324369 is an equidigital number, since it uses as much as digits as its factorization.

1211324369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 1211324369 is about 34804.0855216740. The cubic root of 1211324369 is about 1065.9908692738.

The spelling of 1211324369 in words is "one billion, two hundred eleven million, three hundred twenty-four thousand, three hundred sixty-nine".