1131223122 has 36 divisors (see below), whose sum is σ = 2562202734. Its totient is φ = 360676800.

The previous prime is 1131223103. The next prime is 1131223127. The reversal of 1131223122 is 2213221311.

It can be written as a sum of positive squares in only one way, i.e., 1101509721 + 29713401 = 33189^2 + 5451^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1131223095 and 1131223104.

It is not an unprimeable number, because it can be changed into a prime (1131223127) 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 17 ways as a sum of consecutive naturals, for example, 49879 + ... + 68922.

Almost surely, 2^1131223122 is an apocalyptic number.

1131223122 is an abundant number, since it is smaller than the sum of its proper divisors (1430979612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131223122 is a wasteful number, since it uses less digits than its factorization.

1131223122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118855 (or 118829 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 1131223122 is about 33633.6605501096. The cubic root of 1131223122 is about 1041.9561070907.

Adding to 1131223122 its reverse (2213221311), we get a palindrome (3344444433).

The spelling of 1131223122 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, one hundred twenty-two".