1223212111000 has 288 divisors, whose sum is σ = 3180847662720. Its totient is φ = 439956000000.

The previous prime is 1223212110959. The next prime is 1223212111019. The reversal of 1223212111000 is 1112123221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1234320505 + ... + 1234321495.

It is an arithmetic number, because the mean of its divisors is an integer number (11044609940).

Almost surely, 2^{1223212111000} is an apocalyptic number.

1223212111000 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 1223212111000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1590423831360).

1223212111000 is an abundant number, since it is smaller than the sum of its proper divisors (1957635551720).

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

1223212111000 is a wasteful number, since it uses less digits than its factorization.

1223212111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1223212111000 its reverse (1112123221), we get a palindrome (1224324234221).

The spelling of 1223212111000 in words is "one trillion, two hundred twenty-three billion, two hundred twelve million, one hundred eleven thousand".