1200001311222 has 72 divisors (see below), whose sum is σ = 2845511856936. Its totient is φ = 336388276224.

The previous prime is 1200001311221. The next prime is 1200001311317. The reversal of 1200001311222 is 2221131000021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200001311221) by changing a digit.

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 in 35 ways as a sum of consecutive naturals, for example, 99318 + ... + 1552374.

It is an arithmetic number, because the mean of its divisors is an integer number (39520998013).

Almost surely, 2^{1200001311222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200001311222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422755928468).

1200001311222 is an abundant number, since it is smaller than the sum of its proper divisors (1645510545714).

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

1200001311222 is a wasteful number, since it uses less digits than its factorization.

1200001311222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453182 (or 1453122 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1200001311222 its reverse (2221131000021), we get a palindrome (3421132311243).

The spelling of 1200001311222 in words is "one trillion, two hundred billion, one million, three hundred eleven thousand, two hundred twenty-two".