1223222220000 has 1440 divisors, whose sum is σ = 4970148543360. Its totient is φ = 282631680000.

The previous prime is 1223222219977. The next prime is 1223222220053. The reversal of 1223222220000 is 222223221.

1223222220000 is a `hidden beast` number, since 1 + 223 + 222 + 220 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 4322339859 + ... + 4322340141.

It is an arithmetic number, because the mean of its divisors is an integer number (3451492044).

Almost surely, 2^{1223222220000} is an apocalyptic number.

1223222220000 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 1223222220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2485074271680).

1223222220000 is an abundant number, since it is smaller than the sum of its proper divisors (3746926323360).

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

1223222220000 is a wasteful number, since it uses less digits than its factorization.

1223222220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 1223222220000 its reverse (222223221), we get a palindrome (1223444443221).

The spelling of 1223222220000 in words is "one trillion, two hundred twenty-three billion, two hundred twenty-two million, two hundred twenty thousand".