1131321223 has 16 divisors (see below), whose sum is σ = 1191463936. Its totient is φ = 1072854720.

The previous prime is 1131321211. The next prime is 1131321251. The reversal of 1131321223 is 3221231311.

It is a de Polignac number, because none of the positive numbers 2^k-1131321223 is a prime.

It is a super-2 number, since 2×1131321223² = 2559775419220431458, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131321223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131321823) 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 15 ways as a sum of consecutive naturals, for example, 367336 + ... + 370402.

It is an arithmetic number, because the mean of its divisors is an integer number (74466496).

Almost surely, 2^1131321223 is an apocalyptic number.

1131321223 is a deficient number, since it is larger than the sum of its proper divisors (60142713).

1131321223 is a wasteful number, since it uses less digits than its factorization.

1131321223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3334.

The product of its digits is 216, while the sum is 19.

The square root of 1131321223 is about 33635.1188937991. The cubic root of 1131321223 is about 1041.9862261065.

Adding to 1131321223 its reverse (3221231311), we get a palindrome (4352552534).

The spelling of 1131321223 in words is "one billion, one hundred thirty-one million, three hundred twenty-one thousand, two hundred twenty-three".