12221120121331 has 4 divisors (see below), whose sum is σ = 13332131041464. Its totient is φ = 11110109201200.

The previous prime is 12221120121311. The next prime is 12221120121547. The reversal of 12221120121331 is 13312102112221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12221120121331 - 2¹⁷ = 12221119990259 is a prime.

It is a super-2 number, since 2×12221120121331² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221120121311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555505460050 + ... + 555505460071.

It is an arithmetic number, because the mean of its divisors is an integer number (3333032760366).

Almost surely, 2^{12221120121331} is an apocalyptic number.

12221120121331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12221120121331 is a deficient number, since it is larger than the sum of its proper divisors (1111010920133).

12221120121331 is a wasteful number, since it uses less digits than its factorization.

12221120121331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111010920132.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12221120121331 its reverse (13312102112221), we get a palindrome (25533222233552).

The spelling of 12221120121331 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, three hundred thirty-one".