103120421 has 4 divisors (see below), whose sum is σ = 103152012. Its totient is φ = 103088832.

The previous prime is 103120411. The next prime is 103120463. The reversal of 103120421 is 124021301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124021301 = 2447 ⋅50683.

It can be written as a sum of positive squares in 2 ways, for example, as 65788321 + 37332100 = 8111^2 + 6110^2 .

It is a cyclic number.

It is not a de Polignac number, because 103120421 - 2⁶ = 103120357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 103120396 and 103120405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103120411) 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, 10250 + ... + 17643.

It is an arithmetic number, because the mean of its divisors is an integer number (25788003).

Almost surely, 2^103120421 is an apocalyptic number.

It is an amenable number.

103120421 is a deficient number, since it is larger than the sum of its proper divisors (31591).

103120421 is an equidigital number, since it uses as much as digits as its factorization.

103120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31590.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 103120421 is about 10154.8225489173. The cubic root of 103120421 is about 468.9374229835.

Adding to 103120421 its reverse (124021301), we get a palindrome (227141722).

The spelling of 103120421 in words is "one hundred three million, one hundred twenty thousand, four hundred twenty-one".