11123311210221 has 64 divisors (see below), whose sum is σ = 17334180864000. Its totient is φ = 6342059864448.

The previous prime is 11123311210111. The next prime is 11123311210309. The reversal of 11123311210221 is 12201211332111.

It is not a de Polignac number, because 11123311210221 - 2⁷ = 11123311210093 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123311210321) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 986715841 + ... + 986727113.

It is an arithmetic number, because the mean of its divisors is an integer number (270846576000).

Almost surely, 2^{11123311210221} is an apocalyptic number.

It is an amenable number.

11123311210221 is a deficient number, since it is larger than the sum of its proper divisors (6210869653779).

11123311210221 is a wasteful number, since it uses less digits than its factorization.

11123311210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13343 (or 13329 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 11123311210221 its reverse (12201211332111), we get a palindrome (23324522542332).

The spelling of 11123311210221 in words is "eleven trillion, one hundred twenty-three billion, three hundred eleven million, two hundred ten thousand, two hundred twenty-one".