103112311 has 4 divisors (see below), whose sum is σ = 104354712. Its totient is φ = 101869912.

The previous prime is 103112309. The next prime is 103112329. The reversal of 103112311 is 113211301.

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

It is a cyclic number.

It is not a de Polignac number, because 103112311 - 2¹ = 103112309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103112291 and 103112300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103112351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 621076 + ... + 621241.

It is an arithmetic number, because the mean of its divisors is an integer number (26088678).

Almost surely, 2^103112311 is an apocalyptic number.

103112311 is a deficient number, since it is larger than the sum of its proper divisors (1242401).

103112311 is an equidigital number, since it uses as much as digits as its factorization.

103112311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242400.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 103112311 is about 10154.4232234037. The cubic root of 103112311 is about 468.9251293234.

Adding to 103112311 its reverse (113211301), we get a palindrome (216323612).

The spelling of 103112311 in words is "one hundred three million, one hundred twelve thousand, three hundred eleven".