11323223212121 has 4 divisors (see below), whose sum is σ = 11370207541044. Its totient is φ = 11276238883200.

The previous prime is 11323223212097. The next prime is 11323223212177. The reversal of 11323223212121 is 12121232232311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7529536000000 + 3793687212121 = 2744000^2 + 1947739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11323223212121 is a prime.

It is a super-2 number, since 2×11323223212121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11323223202121) 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 3 ways as a sum of consecutive naturals, for example, 23492164100 + ... + 23492164581.

It is an arithmetic number, because the mean of its divisors is an integer number (2842551885261).

Almost surely, 2^{11323223212121} is an apocalyptic number.

It is an amenable number.

11323223212121 is a deficient number, since it is larger than the sum of its proper divisors (46984328923).

11323223212121 is an equidigital number, since it uses as much as digits as its factorization.

11323223212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46984328922.

The product of its digits is 1728, while the sum is 26.

Adding to 11323223212121 its reverse (12121232232311), we get a palindrome (23444455444432).

The spelling of 11323223212121 in words is "eleven trillion, three hundred twenty-three billion, two hundred twenty-three million, two hundred twelve thousand, one hundred twenty-one".