1223021220320 has 48 divisors (see below), whose sum is σ = 2914957478160. Its totient is φ = 484879202304.

The previous prime is 1223021220247. The next prime is 1223021220367. The reversal of 1223021220320 is 230221203221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1223021220292 and 1223021220301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33804410 + ... + 33840569.

It is an arithmetic number, because the mean of its divisors is an integer number (60728280795).

Almost surely, 2^{1223021220320} is an apocalyptic number.

1223021220320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223021220320 is an abundant number, since it is smaller than the sum of its proper divisors (1691936257840).

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

1223021220320 is a wasteful number, since it uses less digits than its factorization.

1223021220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67645107 (or 67645099 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 1223021220320 its reverse (230221203221), we get a palindrome (1453242423541).

The spelling of 1223021220320 in words is "one trillion, two hundred twenty-three billion, twenty-one million, two hundred twenty thousand, three hundred twenty".