1323220223232 has 144 divisors (see below), whose sum is σ = 4018752386880. Its totient is φ = 429152421888.

The previous prime is 1323220223231. The next prime is 1323220223251. The reversal of 1323220223232 is 2323220223231.

1323220223232 is a `hidden beast` number, since 13 + 2 + 322 + 0 + 2 + 2 + 323 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1323220223196 and 1323220223205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323220223231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2331258 + ... + 2842745.

Almost surely, 2^{1323220223232} is an apocalyptic number.

1323220223232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1323220223232 is an abundant number, since it is smaller than the sum of its proper divisors (2695532163648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1323220223232 is an equidigital number, since it uses as much as digits as its factorization.

1323220223232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5174065 (or 5174045 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

Adding to 1323220223232 its reverse (2323220223231), we get a palindrome (3646440446463).

Subtracting 1323220223232 from its reverse (2323220223231), we obtain a palindrome (999999999999).

The spelling of 1323220223232 in words is "one trillion, three hundred twenty-three billion, two hundred twenty million, two hundred twenty-three thousand, two hundred thirty-two".