103540121 has 4 divisors (see below), whose sum is σ = 107110500. Its totient is φ = 99969744.

The previous prime is 103540109. The next prime is 103540123. The reversal of 103540121 is 121045301.

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

It can be written as a sum of positive squares in 2 ways, for example, as 64963600 + 38576521 = 8060^2 + 6211^2 .

It is a cyclic number.

It is not a de Polignac number, because 103540121 - 2¹⁴ = 103523737 is a prime.

It is a super-3 number, since 3×103540121³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 103540121.

It is not an unprimeable number, because it can be changed into a prime (103540123) 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, 1785146 + ... + 1785203.

It is an arithmetic number, because the mean of its divisors is an integer number (26777625).

Almost surely, 2^103540121 is an apocalyptic number.

It is an amenable number.

103540121 is a deficient number, since it is larger than the sum of its proper divisors (3570379).

103540121 is an equidigital number, since it uses as much as digits as its factorization.

103540121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570378.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 103540121 is about 10175.4666232070. The cubic root of 103540121 is about 469.5727534286.

Adding to 103540121 its reverse (121045301), we get a palindrome (224585422).

The spelling of 103540121 in words is "one hundred three million, five hundred forty thousand, one hundred twenty-one".