1323223012020 has 192 divisors, whose sum is σ = 4617753477120. Its totient is φ = 275651430912.

The previous prime is 1323223012009. The next prime is 1323223012109. The reversal of 1323223012020 is 202103223231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1102512 + ... + 1965191.

It is an arithmetic number, because the mean of its divisors is an integer number (24050799360).

Almost surely, 2^{1323223012020} is an apocalyptic number.

1323223012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323223012020 is an abundant number, since it is smaller than the sum of its proper divisors (3294530465100).

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

1323223012020 is a wasteful number, since it uses less digits than its factorization.

1323223012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3067814 (or 3067812 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 1323223012020 its reverse (202103223231), we get a palindrome (1525326235251).

The spelling of 1323223012020 in words is "one trillion, three hundred twenty-three billion, two hundred twenty-three million, twelve thousand, twenty".