1223243121320 has 64 divisors (see below), whose sum is σ = 3006789776640. Its totient is φ = 444181024000.

The previous prime is 1223243121319. The next prime is 1223243121367. The reversal of 1223243121320 is 231213423221.

It is a self number, because there is not a number n which added to its sum of digits gives 1223243121320.

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, 1674512 + ... + 2291391.

It is an arithmetic number, because the mean of its divisors is an integer number (46981090260).

Almost surely, 2^{1223243121320} is an apocalyptic number.

1223243121320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223243121320 is an abundant number, since it is smaller than the sum of its proper divisors (1783546655320).

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

1223243121320 is a wasteful number, since it uses less digits than its factorization.

1223243121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3966626 (or 3966622 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 1223243121320 its reverse (231213423221), we get a palindrome (1454456544541).

The spelling of 1223243121320 in words is "one trillion, two hundred twenty-three billion, two hundred forty-three million, one hundred twenty-one thousand, three hundred twenty".