1223322231220 has 48 divisors (see below), whose sum is σ = 2572400980800. Its totient is φ = 488676930560.

The previous prime is 1223322231049. The next prime is 1223322231221. The reversal of 1223322231220 is 221322233221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223322231221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113908611 + ... + 113919349.

It is an arithmetic number, because the mean of its divisors is an integer number (53591687100).

Almost surely, 2^{1223322231220} is an apocalyptic number.

1223322231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223322231220 is an abundant number, since it is smaller than the sum of its proper divisors (1349078749580).

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

1223322231220 is a wasteful number, since it uses less digits than its factorization.

1223322231220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17808 (or 17806 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 1223322231220 its reverse (221322233221), we get a palindrome (1444644464441).

The spelling of 1223322231220 in words is "one trillion, two hundred twenty-three billion, three hundred twenty-two million, two hundred thirty-one thousand, two hundred twenty".