1131223142 has 16 divisors (see below), whose sum is σ = 1940220672. Its totient is φ = 484564680.

The previous prime is 1131223141. The next prime is 1131223157. The reversal of 1131223142 is 2413221311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131223141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9767 + ... + 48557.

It is an arithmetic number, because the mean of its divisors is an integer number (121263792).

Almost surely, 2^1131223142 is an apocalyptic number.

1131223142 is a deficient number, since it is larger than the sum of its proper divisors (808997530).

1131223142 is a wasteful number, since it uses less digits than its factorization.

1131223142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40883.

The product of its digits is 288, while the sum is 20.

The square root of 1131223142 is about 33633.6608474308. The cubic root of 1131223142 is about 1041.9561132313.

Adding to 1131223142 its reverse (2413221311), we get a palindrome (3544444453).

The spelling of 1131223142 in words is "one billion, one hundred thirty-one million, two hundred twenty-three thousand, one hundred forty-two".