1222001021200 has 120 divisors (see below), whose sum is σ = 3011872406400. Its totient is φ = 476203015680.

The previous prime is 1222001021191. The next prime is 1222001021231. The reversal of 1222001021200 is 21201002221.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6599481 + ... + 6782119.

It is an arithmetic number, because the mean of its divisors is an integer number (25098936720).

Almost surely, 2^{1222001021200} is an apocalyptic number.

1222001021200 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 1222001021200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505936203200).

1222001021200 is an abundant number, since it is smaller than the sum of its proper divisors (1789871385200).

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

1222001021200 is a wasteful number, since it uses less digits than its factorization.

1222001021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183089 (or 183078 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1222001021200 its reverse (21201002221), we get a palindrome (1243202023421).

The spelling of 1222001021200 in words is "one trillion, two hundred twenty-two billion, one million, twenty-one thousand, two hundred".