1236116321 has 4 divisors (see below), whose sum is σ = 1348490544. Its totient is φ = 1123742100.

The previous prime is 1236116303. The next prime is 1236116333.

1236116321 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1236116321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1236116341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56187095 + ... + 56187116.

It is an arithmetic number, because the mean of its divisors is an integer number (337122636).

Almost surely, 2^1236116321 is an apocalyptic number.

1236116321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1236116321 is a deficient number, since it is larger than the sum of its proper divisors (112374223).

1236116321 is a wasteful number, since it uses less digits than its factorization.

1236116321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112374222.

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

The square root of 1236116321 is about 35158.4459411960. The cubic root of 1236116321 is about 1073.2142903759.

It can be divided in two parts, 12361 and 16321, that added together give a palindrome (28682).

The spelling of 1236116321 in words is "one billion, two hundred thirty-six million, one hundred sixteen thousand, three hundred twenty-one".