103211011111 has 4 divisors (see below), whose sum is σ = 111150319672. Its totient is φ = 95271702552.

The previous prime is 103211011109. The next prime is 103211011159. The reversal of 103211011111 is 111110112301.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 103211011111 - 2¹ = 103211011109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 7939308547 = 103211011111 / (1 + 0 + 3 + 2 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103211011091 and 103211011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103211711111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3969654261 + ... + 3969654286.

It is an arithmetic number, because the mean of its divisors is an integer number (27787579918).

Almost surely, 2^103211011111 is an apocalyptic number.

103211011111 is a deficient number, since it is larger than the sum of its proper divisors (7939308561).

103211011111 is an equidigital number, since it uses as much as digits as its factorization.

103211011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7939308560.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 103211011111 its reverse (111110112301), we get a palindrome (214321123412).

The spelling of 103211011111 in words is "one hundred three billion, two hundred eleven million, eleven thousand, one hundred eleven".