11311221020103 has 48 divisors (see below), whose sum is σ = 17775425337696. Its totient is φ = 6902171688960.

The previous prime is 11311221020093. The next prime is 11311221020159. The reversal of 11311221020103 is 30102012211311.

11311221020103 is a `hidden beast` number, since 11 + 311 + 221 + 0 + 20 + 103 = 666.

It is not a de Polignac number, because 11311221020103 - 2⁴ = 11311221020087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311221021103) 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 47 ways as a sum of consecutive naturals, for example, 11594775 + ... + 12532407.

It is an arithmetic number, because the mean of its divisors is an integer number (370321361202).

Almost surely, 2^{11311221020103} is an apocalyptic number.

11311221020103 is a deficient number, since it is larger than the sum of its proper divisors (6464204317593).

11311221020103 is a wasteful number, since it uses less digits than its factorization.

11311221020103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939824 (or 939821 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 11311221020103 its reverse (30102012211311), we get a palindrome (41413233231414).

The spelling of 11311221020103 in words is "eleven trillion, three hundred eleven billion, two hundred twenty-one million, twenty thousand, one hundred three".