1222100220000 has 240 divisors, whose sum is σ = 4373165788992. Its totient is φ = 296266560000.

The previous prime is 1222100219993. The next prime is 1222100220023. The reversal of 1222100220000 is 220012221.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 265834 + ... + 1585833.

Almost surely, 2^{1222100220000} is an apocalyptic number.

1222100220000 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 1222100220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2186582894496).

1222100220000 is an abundant number, since it is smaller than the sum of its proper divisors (3151065568992).

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

1222100220000 is a wasteful number, since it uses less digits than its factorization.

1222100220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851711 (or 1851688 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1222100220000 its reverse (220012221), we get a palindrome (1222320232221).

The spelling of 1222100220000 in words is "one trillion, two hundred twenty-two billion, one hundred million, two hundred twenty thousand".