103431121 has 4 divisors (see below), whose sum is σ = 103453092. Its totient is φ = 103409152.

The previous prime is 103431103. The next prime is 103431137. The reversal of 103431121 is 121134301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121134301 = 191 ⋅634211.

It can be written as a sum of positive squares in 2 ways, for example, as 35533521 + 67897600 = 5961^2 + 8240^2 .

It is a cyclic number.

It is not a de Polignac number, because 103431121 - 2⁵ = 103431089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103431095 and 103431104.

It is not an unprimeable number, because it can be changed into a prime (103431101) 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, 736 + ... + 14401.

It is an arithmetic number, because the mean of its divisors is an integer number (25863273).

Almost surely, 2^103431121 is an apocalyptic number.

It is an amenable number.

103431121 is a deficient number, since it is larger than the sum of its proper divisors (21971).

103431121 is an equidigital number, since it uses as much as digits as its factorization.

103431121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21970.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 103431121 is about 10170.1091931208. The cubic root of 103431121 is about 469.4079174824.

Adding to 103431121 its reverse (121134301), we get a palindrome (224565422).

The spelling of 103431121 in words is "one hundred three million, four hundred thirty-one thousand, one hundred twenty-one".