1121032221 has 4 divisors (see below), whose sum is σ = 1494709632. Its totient is φ = 747354812.

The previous prime is 1121032189. The next prime is 1121032223. The reversal of 1121032221 is 1222301211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1121032221 - 2⁵ = 1121032189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121032221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121032223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186838701 + ... + 186838706.

It is an arithmetic number, because the mean of its divisors is an integer number (373677408).

Almost surely, 2^1121032221 is an apocalyptic number.

It is an amenable number.

1121032221 is a deficient number, since it is larger than the sum of its proper divisors (373677411).

1121032221 is an equidigital number, since it uses as much as digits as its factorization.

1121032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373677410.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1121032221 is about 33481.8192606077. The cubic root of 1121032221 is about 1038.8177582107.

Adding to 1121032221 its reverse (1222301211), we get a palindrome (2343333432).

It can be divided in two parts, 1121032 and 221, that added together give a triangular number (1121253 = T₁₄₉₇).

The spelling of 1121032221 in words is "one billion, one hundred twenty-one million, thirty-two thousand, two hundred twenty-one".