1200001100222 has 4 divisors (see below), whose sum is σ = 1800001650336. Its totient is φ = 600000550110.

The previous prime is 1200001100203. The next prime is 1200001100231. The reversal of 1200001100222 is 2220011000021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 300000275054 + ... + 300000275057.

It is an arithmetic number, because the mean of its divisors is an integer number (450000412584).

Almost surely, 2^{1200001100222} is an apocalyptic number.

1200001100222 is a deficient number, since it is larger than the sum of its proper divisors (600000550114).

1200001100222 is an equidigital number, since it uses as much as digits as its factorization.

1200001100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600000550113.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1200001100222 its reverse (2220011000021), we get a palindrome (3420012100243).

The spelling of 1200001100222 in words is "one trillion, two hundred billion, one million, one hundred thousand, two hundred twenty-two".