1223023121320 has 512 divisors, whose sum is σ = 3829675852800. Its totient is φ = 339075072000.

The previous prime is 1223023121263. The next prime is 1223023121347. The reversal of 1223023121320 is 231213203221.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1223023121291 and 1223023121300.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1018336720 + ... + 1018337920.

It is an arithmetic number, because the mean of its divisors is an integer number (7479835650).

Almost surely, 2^{1223023121320} is an apocalyptic number.

1223023121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223023121320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1914837926400).

1223023121320 is an abundant number, since it is smaller than the sum of its proper divisors (2606652731480).

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

1223023121320 is a wasteful number, since it uses less digits than its factorization.

1223023121320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1223023121320 its reverse (231213203221), we get a palindrome (1454236324541).

The spelling of 1223023121320 in words is "one trillion, two hundred twenty-three billion, twenty-three million, one hundred twenty-one thousand, three hundred twenty".