1323221233545 has 16 divisors (see below), whose sum is σ = 2352393304320. Its totient is φ = 705717991152.

The previous prime is 1323221233531. The next prime is 1323221233597. The reversal of 1323221233545 is 5453321223231.

1323221233545 is a `hidden beast` number, since 1 + 32 + 32 + 21 + 2 + 33 + 545 = 666.

It is not a de Polignac number, because 1323221233545 - 2²⁰ = 1323220184969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4900819249 + ... + 4900819518.

It is an arithmetic number, because the mean of its divisors is an integer number (147024581520).

Almost surely, 2^{1323221233545} is an apocalyptic number.

1323221233545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1323221233545 is a deficient number, since it is larger than the sum of its proper divisors (1029172070775).

1323221233545 is an equidigital number, since it uses as much as digits as its factorization.

1323221233545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9801638781 (or 9801638775 counting only the distinct ones).

The product of its digits is 129600, while the sum is 36.

Adding to 1323221233545 its reverse (5453321223231), we get a palindrome (6776542456776).

The spelling of 1323221233545 in words is "one trillion, three hundred twenty-three billion, two hundred twenty-one million, two hundred thirty-three thousand, five hundred forty-five".