1213131124 has 12 divisors (see below), whose sum is σ = 2174759748. Its totient is φ = 591771200.

The previous prime is 1213131109. The next prime is 1213131137. The reversal of 1213131124 is 4211313121.

It can be written as a sum of positive squares in 2 ways, for example, as 326163600 + 886967524 = 18060^2 + 29782^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3698407 + ... + 3698734.

It is an arithmetic number, because the mean of its divisors is an integer number (181229979).

Almost surely, 2^1213131124 is an apocalyptic number.

It is an amenable number.

1213131124 is a deficient number, since it is larger than the sum of its proper divisors (961628624).

1213131124 is a wasteful number, since it uses less digits than its factorization.

1213131124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7397186 (or 7397184 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 1213131124 is about 34830.0319264855. The cubic root of 1213131124 is about 1066.5206000944.

Adding to 1213131124 its reverse (4211313121), we get a palindrome (5424444245).

The spelling of 1213131124 in words is "one billion, two hundred thirteen million, one hundred thirty-one thousand, one hundred twenty-four".