11232031121 has 16 divisors (see below), whose sum is σ = 11960619408. Its totient is φ = 10511155200.

The previous prime is 11232031021. The next prime is 11232031123. The reversal of 11232031121 is 12113023211.

It can be written as a sum of positive squares in 8 ways, for example, as 713477521 + 10518553600 = 26711^2 + 102560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11232031121 is a prime.

It is a super-2 number, since 2×11232031121² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11232031121.

It is not an unprimeable number, because it can be changed into a prime (11232031123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2486561 + ... + 2491073.

It is an arithmetic number, because the mean of its divisors is an integer number (747538713).

Almost surely, 2^11232031121 is an apocalyptic number.

It is an amenable number.

11232031121 is a deficient number, since it is larger than the sum of its proper divisors (728588287).

11232031121 is a wasteful number, since it uses less digits than its factorization.

11232031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11232031121 its reverse (12113023211), we get a palindrome (23345054332).

The spelling of 11232031121 in words is "eleven billion, two hundred thirty-two million, thirty-one thousand, one hundred twenty-one".