1331121044 has 48 divisors (see below), whose sum is σ = 2671353216. Its totient is φ = 574464000.

The previous prime is 1331121041. The next prime is 1331121053. The reversal of 1331121044 is 4401211331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331121041) 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, 133844 + ... + 143444.

It is an arithmetic number, because the mean of its divisors is an integer number (55653192).

Almost surely, 2^1331121044 is an apocalyptic number.

It is an amenable number.

1331121044 is an abundant number, since it is smaller than the sum of its proper divisors (1340232172).

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

1331121044 is a wasteful number, since it uses less digits than its factorization.

1331121044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9776 (or 9774 counting only the distinct ones).

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

The square root of 1331121044 is about 36484.5315716126. The cubic root of 1331121044 is about 1100.0333444438.

Adding to 1331121044 its reverse (4401211331), we get a palindrome (5732332375).

The spelling of 1331121044 in words is "one billion, three hundred thirty-one million, one hundred twenty-one thousand, forty-four".