1121201320 has 16 divisors (see below), whose sum is σ = 2522703060. Its totient is φ = 448480512.

The previous prime is 1121201317. The next prime is 1121201353. The reversal of 1121201320 is 231021211.

It can be written as a sum of positive squares in 2 ways, for example, as 1118634916 + 2566404 = 33446^2 + 1602^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1121201320.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14014977 + ... + 14015056.

Almost surely, 2^1121201320 is an apocalyptic number.

1121201320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121201320 is an abundant number, since it is smaller than the sum of its proper divisors (1401501740).

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

1121201320 is a wasteful number, since it uses less digits than its factorization.

1121201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28030044 (or 28030040 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1121201320 is about 33484.3444015259. The cubic root of 1121201320 is about 1038.8699881136.

Adding to 1121201320 its reverse (231021211), we get a palindrome (1352222531).

The spelling of 1121201320 in words is "one billion, one hundred twenty-one million, two hundred one thousand, three hundred twenty".