1211223122323 has 4 divisors (see below), whose sum is σ = 1220469100488. Its totient is φ = 1201977144160.

The previous prime is 1211223122321. The next prime is 1211223122339. The reversal of 1211223122323 is 3232213221121.

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 1211223122323 - 2¹ = 1211223122321 is a prime.

It is a super-2 number, since 2×1211223122323² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211223122321) 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, 4622988886 + ... + 4622989147.

It is an arithmetic number, because the mean of its divisors is an integer number (305117275122).

Almost surely, 2^{1211223122323} is an apocalyptic number.

1211223122323 is a deficient number, since it is larger than the sum of its proper divisors (9245978165).

1211223122323 is an equidigital number, since it uses as much as digits as its factorization.

1211223122323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9245978164.

The product of its digits is 1728, while the sum is 25.

Adding to 1211223122323 its reverse (3232213221121), we get a palindrome (4443436343444).

The spelling of 1211223122323 in words is "one trillion, two hundred eleven billion, two hundred twenty-three million, one hundred twenty-two thousand, three hundred twenty-three".