1222222101200 has 60 divisors (see below), whose sum is σ = 2963328048780. Its totient is φ = 484403604480.

The previous prime is 1222222101167. The next prime is 1222222101203. The reversal of 1222222101200 is 21012222221.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 29775573136 + 1192446528064 = 172556^2 + 1091992^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222222101203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13972709 + ... + 14059908.

It is an arithmetic number, because the mean of its divisors is an integer number (49388800813).

Almost surely, 2^{1222222101200} is an apocalyptic number.

1222222101200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222222101200 is an abundant number, since it is smaller than the sum of its proper divisors (1741105947580).

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

1222222101200 is a wasteful number, since it uses less digits than its factorization.

1222222101200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28032744 (or 28032733 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1222222101200 its reverse (21012222221), we get a palindrome (1243234323421).

The spelling of 1222222101200 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred one thousand, two hundred".