1312221211103 has 16 divisors (see below), whose sum is σ = 1432487586816. Its totient is φ = 1192117419840.

The previous prime is 1312221211061. The next prime is 1312221211121. The reversal of 1312221211103 is 3011121222131.

It is a cyclic number.

It is not a de Polignac number, because 1312221211103 - 2²⁶ = 1312154102239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312221211123) 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 15 ways as a sum of consecutive naturals, for example, 153597650 + ... + 153606192.

It is an arithmetic number, because the mean of its divisors is an integer number (89530474176).

Almost surely, 2^{1312221211103} is an apocalyptic number.

1312221211103 is a deficient number, since it is larger than the sum of its proper divisors (120266375713).

1312221211103 is a wasteful number, since it uses less digits than its factorization.

1312221211103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16414.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 1312221211103 its reverse (3011121222131), we get a palindrome (4323342433234).

The spelling of 1312221211103 in words is "one trillion, three hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, one hundred three".