103121 has 4 divisors (see below), whose sum is σ = 104244. Its totient is φ = 102000.

The previous prime is 103099. The next prime is 103123. The reversal of 103121 is 121301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121301 = 101 ⋅1201.

It can be written as a sum of positive squares in 2 ways, for example, as 83521 + 19600 = 289^2 + 140^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103099 and 103108.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 103121.

It is not an unprimeable number, because it can be changed into a prime (103123) 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, 410 + ... + 611.

It is an arithmetic number, because the mean of its divisors is an integer number (26061).

2¹⁰³¹²¹ is an apocalyptic number.

It is an amenable number.

103121 is a deficient number, since it is larger than the sum of its proper divisors (1123).

103121 is a wasteful number, since it uses less digits than its factorization.

103121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 103121 is about 321.1245864147. The cubic root of 103121 is about 46.8938300644.

Adding to 103121 its reverse (121301), we get a palindrome (224422).

The spelling of 103121 in words is "one hundred three thousand, one hundred twenty-one", and thus it is an iban number.