1131768221 has 8 divisors (see below), whose sum is σ = 1149249504. Its totient is φ = 1114304400.

The previous prime is 1131768191. The next prime is 1131768241. The reversal of 1131768221 is 1228671311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131768221 - 2²² = 1127573917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131768241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195671 + ... + 201371.

It is an arithmetic number, because the mean of its divisors is an integer number (143656188).

Almost surely, 2^1131768221 is an apocalyptic number.

It is an amenable number.

1131768221 is a deficient number, since it is larger than the sum of its proper divisors (17481283).

1131768221 is an equidigital number, since it uses as much as digits as its factorization.

1131768221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8731.

The product of its digits is 4032, while the sum is 32.

The square root of 1131768221 is about 33641.7630483303. The cubic root of 1131768221 is about 1042.1234416088.

The spelling of 1131768221 in words is "one billion, one hundred thirty-one million, seven hundred sixty-eight thousand, two hundred twenty-one".