1222220100000 has 576 divisors, whose sum is σ = 4264134077952. Its totient is φ = 305448960000.

The previous prime is 1222220099963. The next prime is 1222220100001. The reversal of 1222220100000 is 10222221.

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

It is not an unprimeable number, because it can be changed into a prime (1222220100001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1871699674 + ... + 1871700326.

It is an arithmetic number, because the mean of its divisors is an integer number (7403010552).

Almost surely, 2^{1222220100000} is an apocalyptic number.

1222220100000 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 1222220100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2132067038976).

1222220100000 is an abundant number, since it is smaller than the sum of its proper divisors (3041913977952).

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

1222220100000 is an equidigital number, since it uses as much as digits as its factorization.

1222220100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075 (or 1047 counting only the distinct ones).

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

Adding to 1222220100000 its reverse (10222221), we get a palindrome (1222230322221).

The spelling of 1222220100000 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, one hundred thousand".