1121331321 has 18 divisors (see below), whose sum is σ = 1780334010. Its totient is φ = 679594080.

The previous prime is 1121331317. The next prime is 1121331347. The reversal of 1121331321 is 1231331211.

1121331321 is a `hidden beast` number, since 1 + 12 + 1 + 331 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 849081321 + 272250000 = 29139^2 + 16500^2 .

It is not a de Polignac number, because 1121331321 - 2² = 1121331317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121331294 and 1121331303.

It is not an unprimeable number, because it can be changed into a prime (1121331221) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 513756 + ... + 515933.

It is an arithmetic number, because the mean of its divisors is an integer number (98907445).

Almost surely, 2^1121331321 is an apocalyptic number.

1121331321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1121331321 is a deficient number, since it is larger than the sum of its proper divisors (659002689).

1121331321 is a wasteful number, since it uses less digits than its factorization.

1121331321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029717 (or 1029703 counting only the distinct ones).

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

The square root of 1121331321 is about 33486.2855658850. The cubic root of 1121331321 is about 1038.9101381787.

Adding to 1121331321 its reverse (1231331211), we get a palindrome (2352662532).

The spelling of 1121331321 in words is "one billion, one hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty-one".