1211201122312 has 16 divisors (see below), whose sum is σ = 2271164193900. Its totient is φ = 605557337280.

The previous prime is 1211201122301. The next prime is 1211201122319. The reversal of 1211201122312 is 2132211021121.

It can be written as a sum of positive squares in 2 ways, for example, as 1205502986116 + 5698136196 = 1097954^2 + 75486^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1211201122312.

It is not an unprimeable number, because it can be changed into a prime (1211201122319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5283739 + ... + 5508202.

Almost surely, 2^{1211201122312} is an apocalyptic number.

It is an amenable number.

1211201122312 is a deficient number, since it is larger than the sum of its proper divisors (1059963071588).

1211201122312 is a wasteful number, since it uses less digits than its factorization.

1211201122312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805976 (or 10805972 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211201122312 its reverse (2132211021121), we get a palindrome (3343412143433).

The spelling of 1211201122312 in words is "one trillion, two hundred eleven billion, two hundred one million, one hundred twenty-two thousand, three hundred twelve".