1132031221 has 4 divisors (see below), whose sum is σ = 1147538572. Its totient is φ = 1116523872.

The previous prime is 1132031213. The next prime is 1132031239. The reversal of 1132031221 is 1221302311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 664866225 + 467164996 = 25785^2 + 21614^2 .

It is a cyclic number.

It is not a de Polignac number, because 1132031221 - 2³ = 1132031213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1132031195 and 1132031204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1132031281) 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, 7753566 + ... + 7753711.

It is an arithmetic number, because the mean of its divisors is an integer number (286884643).

Almost surely, 2^1132031221 is an apocalyptic number.

It is an amenable number.

1132031221 is a deficient number, since it is larger than the sum of its proper divisors (15507351).

1132031221 is an equidigital number, since it uses as much as digits as its factorization.

1132031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15507350.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1132031221 is about 33645.6716532751. The cubic root of 1132031221 is about 1042.2041581467.

Adding to 1132031221 its reverse (1221302311), we get a palindrome (2353333532).

The spelling of 1132031221 in words is "one billion, one hundred thirty-two million, thirty-one thousand, two hundred twenty-one".