1323120101 has 4 divisors (see below), whose sum is σ = 1323208812. Its totient is φ = 1323031392.

The previous prime is 1323120067. The next prime is 1323120133. The reversal of 1323120101 is 1010213231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 564062500 + 759057601 = 23750^2 + 27551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1323120101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323120901) 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 3 ways as a sum of consecutive naturals, for example, 15896 + ... + 53841.

It is an arithmetic number, because the mean of its divisors is an integer number (330802203).

Almost surely, 2^1323120101 is an apocalyptic number.

It is an amenable number.

1323120101 is a deficient number, since it is larger than the sum of its proper divisors (88711).

1323120101 is an equidigital number, since it uses as much as digits as its factorization.

1323120101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88710.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1323120101 is about 36374.7178820675. The cubic root of 1323120101 is about 1097.8249309190.

Adding to 1323120101 its reverse (1010213231), we get a palindrome (2333333332).

The spelling of 1323120101 in words is "one billion, three hundred twenty-three million, one hundred twenty thousand, one hundred one".