1131021044 has 36 divisors (see below), whose sum is σ = 2076079236. Its totient is φ = 539096448.

The previous prime is 1131021043. The next prime is 1131021053. The reversal of 1131021044 is 4401201311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 787363600 + 343657444 = 28060^2 + 18538^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131021043) 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 11 ways as a sum of consecutive naturals, for example, 788552 + ... + 789984.

Almost surely, 2^1131021044 is an apocalyptic number.

It is an amenable number.

1131021044 is a deficient number, since it is larger than the sum of its proper divisors (945058192).

1131021044 is a wasteful number, since it uses less digits than its factorization.

1131021044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1856 (or 1831 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1131021044 is about 33630.6563123588. The cubic root of 1131021044 is about 1041.8940595184.

Adding to 1131021044 its reverse (4401201311), we get a palindrome (5532222355).

The spelling of 1131021044 in words is "one billion, one hundred thirty-one million, twenty-one thousand, forty-four".