1221103233423 has 12 divisors (see below), whose sum is σ = 1766189702160. Its totient is φ = 812973166656.

The previous prime is 1221103233409. The next prime is 1221103233433. The reversal of 1221103233423 is 3243323011221.

1221103233423 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 1 + 0 + 3 + 233 + 423 = 666.

It is not a de Polignac number, because 1221103233423 - 2¹³ = 1221103225231 is a prime.

It is a super-2 number, since 2×1221103233423² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221103233433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91297578 + ... + 91310951.

It is an arithmetic number, because the mean of its divisors is an integer number (147182475180).

Almost surely, 2^{1221103233423} is an apocalyptic number.

1221103233423 is a deficient number, since it is larger than the sum of its proper divisors (545086468737).

1221103233423 is a wasteful number, since it uses less digits than its factorization.

1221103233423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182609278 (or 182609275 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

Adding to 1221103233423 its reverse (3243323011221), we get a palindrome (4464426244644).

It can be divided in two parts, 122110 and 3233423, that added together give a palindrome (3355533).

The spelling of 1221103233423 in words is "one trillion, two hundred twenty-one billion, one hundred three million, two hundred thirty-three thousand, four hundred twenty-three".