1121302291 has 4 divisors (see below), whose sum is σ = 1142458992. Its totient is φ = 1100145592.

The previous prime is 1121302289. The next prime is 1121302349. The reversal of 1121302291 is 1922031211.

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

It is not a de Polignac number, because 1121302291 - 2¹ = 1121302289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121302211) 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, 10578271 + ... + 10578376.

It is an arithmetic number, because the mean of its divisors is an integer number (285614748).

Almost surely, 2^1121302291 is an apocalyptic number.

1121302291 is a deficient number, since it is larger than the sum of its proper divisors (21156701).

1121302291 is an equidigital number, since it uses as much as digits as its factorization.

1121302291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21156700.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1121302291 is about 33485.8521020445. The cubic root of 1121302291 is about 1038.9011726984.

The spelling of 1121302291 in words is "one billion, one hundred twenty-one million, three hundred two thousand, two hundred ninety-one".