1121013231 has 16 divisors (see below), whose sum is σ = 1613207904. Its totient is φ = 688333824.

The previous prime is 1121013217. The next prime is 1121013233. The reversal of 1121013231 is 1323101211.

It is a happy number.

It is not a de Polignac number, because 1121013231 - 2¹¹ = 1121011183 is a prime.

It is a super-3 number, since 3×1121013231³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1121013231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121013233) 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, 13626 + ... + 49271.

It is an arithmetic number, because the mean of its divisors is an integer number (100825494).

Almost surely, 2^1121013231 is an apocalyptic number.

1121013231 is a deficient number, since it is larger than the sum of its proper divisors (492194673).

1121013231 is a wasteful number, since it uses less digits than its factorization.

1121013231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63370.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1121013231 is about 33481.5356726659. The cubic root of 1121013231 is about 1038.8118924082.

Adding to 1121013231 its reverse (1323101211), we get a palindrome (2444114442).

The spelling of 1121013231 in words is "one billion, one hundred twenty-one million, thirteen thousand, two hundred thirty-one".