103120321 has 4 divisors (see below), whose sum is σ = 105518512. Its totient is φ = 100722132.

The previous prime is 103120313. The next prime is 103120333. The reversal of 103120321 is 123021301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 123021301 = 13 ⋅9463177.

It is a cyclic number.

It is not a de Polignac number, because 103120321 - 2³ = 103120313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103120301) 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, 1199031 + ... + 1199116.

It is an arithmetic number, because the mean of its divisors is an integer number (26379628).

Almost surely, 2^103120321 is an apocalyptic number.

It is an amenable number.

103120321 is a deficient number, since it is larger than the sum of its proper divisors (2398191).

103120321 is an equidigital number, since it uses as much as digits as its factorization.

103120321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398190.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 103120321 is about 10154.8176251472. The cubic root of 103120321 is about 468.9372714010.

Adding to 103120321 its reverse (123021301), we get a palindrome (226141622).

The spelling of 103120321 in words is "one hundred three million, one hundred twenty thousand, three hundred twenty-one".