1323121113 has 6 divisors (see below), whose sum is σ = 1911174954. Its totient is φ = 882080736.

The previous prime is 1323121099. The next prime is 1323121157. The reversal of 1323121113 is 3111213231.

It can be written as a sum of positive squares in only one way, i.e., 1304871129 + 18249984 = 36123^2 + 4272^2 .

It is not a de Polignac number, because 1323121113 - 2²² = 1318926809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1323121193) 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 in 5 ways as a sum of consecutive naturals, for example, 73506720 + ... + 73506737.

It is an arithmetic number, because the mean of its divisors is an integer number (318529159).

Almost surely, 2^1323121113 is an apocalyptic number.

It is an amenable number.

1323121113 is a deficient number, since it is larger than the sum of its proper divisors (588053841).

1323121113 is a wasteful number, since it uses less digits than its factorization.

1323121113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147013463 (or 147013460 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1323121113 is about 36374.7317928256. The cubic root of 1323121113 is about 1097.8252108126.

Adding to 1323121113 its reverse (3111213231), we get a palindrome (4434334344).

The spelling of 1323121113 in words is "one billion, three hundred twenty-three million, one hundred twenty-one thousand, one hundred thirteen".