1221122230223 has 4 divisors (see below), whose sum is σ = 1395568263120. Its totient is φ = 1046676197328.

The previous prime is 1221122230213. The next prime is 1221122230267. The reversal of 1221122230223 is 3220322211221.

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 1221122230223 - 2¹⁰ = 1221122229199 is a prime.

It is a super-2 number, since 2×1221122230223² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221122230213) 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, 87223016438 + ... + 87223016451.

It is an arithmetic number, because the mean of its divisors is an integer number (348892065780).

Almost surely, 2^{1221122230223} is an apocalyptic number.

1221122230223 is a deficient number, since it is larger than the sum of its proper divisors (174446032897).

1221122230223 is an equidigital number, since it uses as much as digits as its factorization.

1221122230223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174446032896.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1221122230223 its reverse (3220322211221), we get a palindrome (4441444441444).

The spelling of 1221122230223 in words is "one trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred thirty thousand, two hundred twenty-three".