1212221121323 has 4 divisors (see below), whose sum is σ = 1219942275120. Its totient is φ = 1204499967528.

The previous prime is 1212221121269. The next prime is 1212221121329. The reversal of 1212221121323 is 3231211222121.

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 1212221121323 - 2²⁴ = 1212204344107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212221121329) 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, 3860576663 + ... + 3860576976.

It is an arithmetic number, because the mean of its divisors is an integer number (304985568780).

Almost surely, 2^{1212221121323} is an apocalyptic number.

1212221121323 is a deficient number, since it is larger than the sum of its proper divisors (7721153797).

1212221121323 is an equidigital number, since it uses as much as digits as its factorization.

1212221121323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7721153796.

The product of its digits is 576, while the sum is 23.

Adding to 1212221121323 its reverse (3231211222121), we get a palindrome (4443432343444).

The spelling of 1212221121323 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred twenty-three".