1132211221 has 4 divisors (see below), whose sum is σ = 1132310700. Its totient is φ = 1132111744.

The previous prime is 1132211219. The next prime is 1132211261. The reversal of 1132211221 is 1221122311.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 397204900 + 735006321 = 19930^2 + 27111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1132211221 - 2¹ = 1132211219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1132211195 and 1132211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1132211261) 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, 30076 + ... + 56293.

It is an arithmetic number, because the mean of its divisors is an integer number (283077675).

Almost surely, 2^1132211221 is an apocalyptic number.

It is an amenable number.

1132211221 is a deficient number, since it is larger than the sum of its proper divisors (99479).

1132211221 is an equidigital number, since it uses as much as digits as its factorization.

1132211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99478.

The product of its digits is 48, while the sum is 16.

The square root of 1132211221 is about 33648.3464824053. The cubic root of 1132211221 is about 1042.2593941988.

Adding to 1132211221 its reverse (1221122311), we get a palindrome (2353333532).

The spelling of 1132211221 in words is "one billion, one hundred thirty-two million, two hundred eleven thousand, two hundred twenty-one".