311220113103 has 12 divisors (see below), whose sum is σ = 449617866048. Its totient is φ = 207444212640.

The previous prime is 311220113101. The next prime is 311220113117. The reversal of 311220113103 is 301311022113.

311220113103 is a `hidden beast` number, since 311 + 220 + 1 + 131 + 0 + 3 = 666.

It is not a de Polignac number, because 311220113103 - 2¹ = 311220113101 is a prime.

It is a super-2 number, since 2×311220113103² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311220113101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2933550 + ... + 3037787.

It is an arithmetic number, because the mean of its divisors is an integer number (37468155504).

Almost surely, 2^311220113103 is an apocalyptic number.

311220113103 is a deficient number, since it is larger than the sum of its proper divisors (138397752945).

311220113103 is a wasteful number, since it uses less digits than its factorization.

311220113103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5977134 (or 5977131 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 311220113103 its reverse (301311022113), we get a palindrome (612531135216).

The spelling of 311220113103 in words is "three hundred eleven billion, two hundred twenty million, one hundred thirteen thousand, one hundred three".