103111131 has 4 divisors (see below), whose sum is σ = 137481512. Its totient is φ = 68740752.

The previous prime is 103111111. The next prime is 103111133. The reversal of 103111131 is 131111301.

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

It is not a de Polignac number, because 103111131 - 2⁶ = 103111067 is a prime.

It is a super-2 number, since 2×103111131² = 21263810672198322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103111133) 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, 17185186 + ... + 17185191.

It is an arithmetic number, because the mean of its divisors is an integer number (34370378).

Almost surely, 2^103111131 is an apocalyptic number.

103111131 is a deficient number, since it is larger than the sum of its proper divisors (34370381).

103111131 is an equidigital number, since it uses as much as digits as its factorization.

103111131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34370380.

The product of its (nonzero) digits is 9, while the sum is 12.

The square root of 103111131 is about 10154.3651204790. The cubic root of 103111131 is about 468.9233405497.

Adding to 103111131 its reverse (131111301), we get a palindrome (234222432).

The spelling of 103111131 in words is "one hundred three million, one hundred eleven thousand, one hundred thirty-one".