1321116204 has 24 divisors (see below), whose sum is σ = 3084274368. Its totient is φ = 440133520.

The previous prime is 1321116169. The next prime is 1321116211. The reversal of 1321116204 is 4026111231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5982 + ... + 51749.

It is an arithmetic number, because the mean of its divisors is an integer number (128511432).

Almost surely, 2^1321116204 is an apocalyptic number.

It is an amenable number.

1321116204 is an abundant number, since it is smaller than the sum of its proper divisors (1763158164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321116204 is a wasteful number, since it uses less digits than its factorization.

1321116204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59645 (or 59643 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1321116204 is about 36347.1622551197. The cubic root of 1321116204 is about 1097.2704235255.

Adding to 1321116204 its reverse (4026111231), we get a palindrome (5347227435).

The spelling of 1321116204 in words is "one billion, three hundred twenty-one million, one hundred sixteen thousand, two hundred four".