1223100000000 has 810 divisors, whose sum is σ = 4589017181672. Its totient is φ = 324000000000.

The previous prime is 1223099999969. The next prime is 1223100000011. The reversal of 1223100000000 is 13221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (810).

It is a super-2 number, since 2×1223100000000² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 8099999925 + ... + 8100000075.

Almost surely, 2^{1223100000000} is an apocalyptic number.

1223100000000 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 1223100000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2294508590836).

1223100000000 is an abundant number, since it is smaller than the sum of its proper divisors (3365917181672).

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

1223100000000 is an frugal number, since it uses more digits than its factorization.

1223100000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 1223100000000 its reverse (13221), we get a palindrome (1223100013221).

The spelling of 1223100000000 in words is "one trillion, two hundred twenty-three billion, one hundred million", and thus it is an aban number.