11232001221 has 32 divisors (see below), whose sum is σ = 18025328640. Its totient is φ = 6077415744.

The previous prime is 11232001211. The next prime is 11232001243. The reversal of 11232001221 is 12210023211.

It is not a de Polignac number, because 11232001221 - 2⁷ = 11232001093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11232001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11232001211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 944911 + ... + 956723.

It is an arithmetic number, because the mean of its divisors is an integer number (563291520).

Almost surely, 2^11232001221 is an apocalyptic number.

It is an amenable number.

11232001221 is a deficient number, since it is larger than the sum of its proper divisors (6793327419).

11232001221 is a wasteful number, since it uses less digits than its factorization.

11232001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14225.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11232001221 its reverse (12210023211), we get a palindrome (23442024432).

The spelling of 11232001221 in words is "eleven billion, two hundred thirty-two million, one thousand, two hundred twenty-one".