1223212200320 has 128 divisors (see below), whose sum is σ = 3191719070880. Its totient is φ = 444576153600.

The previous prime is 1223212200313. The next prime is 1223212200337. The reversal of 1223212200320 is 230022123221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

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 = 1223212200292 and 1223212200301.

It is a congruent number.

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, 13987130 + ... + 14074310.

Almost surely, 2^{1223212200320} is an apocalyptic number.

1223212200320 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 1223212200320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1595859535440).

1223212200320 is an abundant number, since it is smaller than the sum of its proper divisors (1968506870560).

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

1223212200320 is a wasteful number, since it uses less digits than its factorization.

1223212200320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89204 (or 89192 counting only the distinct ones).

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

Adding to 1223212200320 its reverse (230022123221), we get a palindrome (1453234323541).

The spelling of 1223212200320 in words is "one trillion, two hundred twenty-three billion, two hundred twelve million, two hundred thousand, three hundred twenty".