12221213011123 has 4 divisors (see below), whose sum is σ = 12246727026240. Its totient is φ = 12195698996008.

The previous prime is 12221213011093. The next prime is 12221213011127. The reversal of 12221213011123 is 32111031212221.

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 12221213011123 - 2³³ = 12212623076531 is a prime.

It is a super-2 number, since 2×12221213011123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221213011094 and 12221213011103.

It is not an unprimeable number, because it can be changed into a prime (12221213011127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12757006840 + ... + 12757007797.

It is an arithmetic number, because the mean of its divisors is an integer number (3061681756560).

Almost surely, 2^{12221213011123} is an apocalyptic number.

12221213011123 is a deficient number, since it is larger than the sum of its proper divisors (25514015117).

12221213011123 is an equidigital number, since it uses as much as digits as its factorization.

12221213011123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25514015116.

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

Adding to 12221213011123 its reverse (32111031212221), we get a palindrome (44332244223344).

The spelling of 12221213011123 in words is "twelve trillion, two hundred twenty-one billion, two hundred thirteen million, eleven thousand, one hundred twenty-three".