11232111221 has 8 divisors (see below), whose sum is σ = 11296020384. Its totient is φ = 11168272080.

The previous prime is 11232111173. The next prime is 11232111251. The reversal of 11232111221 is 12211123211.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11232111221 - 2¹⁸ = 11231849077 is a prime.

It is a super-2 number, since 2×11232111221² (a number of 21 digits) contains 22 as substring.

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 11232111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11232111251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322886 + ... + 355976.

It is an arithmetic number, because the mean of its divisors is an integer number (1412002548).

Almost surely, 2^11232111221 is an apocalyptic number.

It is an amenable number.

11232111221 is a deficient number, since it is larger than the sum of its proper divisors (63909163).

11232111221 is a wasteful number, since it uses less digits than its factorization.

11232111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35011.

The product of its digits is 48, while the sum is 17.

Adding to 11232111221 its reverse (12211123211), we get a palindrome (23443234432).

It can be divided in two parts, 11 and 232111221, that added together give a palindrome (232111232).

The spelling of 11232111221 in words is "eleven billion, two hundred thirty-two million, one hundred eleven thousand, two hundred twenty-one".