1223320221300 has 144 divisors (see below), whose sum is σ = 3582092606400. Its totient is φ = 322312473600.

The previous prime is 1223320221217. The next prime is 1223320221349. The reversal of 1223320221300 is 31220233221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8931736 + ... + 9067664.

It is an arithmetic number, because the mean of its divisors is an integer number (24875643100).

Almost surely, 2^{1223320221300} is an apocalyptic number.

1223320221300 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 1223320221300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1791046303200).

1223320221300 is an abundant number, since it is smaller than the sum of its proper divisors (2358772385100).

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

1223320221300 is a wasteful number, since it uses less digits than its factorization.

1223320221300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136306 (or 136299 counting only the distinct ones).

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

Adding to 1223320221300 its reverse (31220233221), we get a palindrome (1254540454521).

The spelling of 1223320221300 in words is "one trillion, two hundred twenty-three billion, three hundred twenty million, two hundred twenty-one thousand, three hundred".