103031221 has 4 divisors (see below), whose sum is σ = 103084812. Its totient is φ = 102977632.

The previous prime is 103031189. The next prime is 103031231. The reversal of 103031221 is 122130301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122130301 = 397 ⋅307633.

It can be written as a sum of positive squares in 2 ways, for example, as 56040196 + 46991025 = 7486^2 + 6855^2 .

It is a cyclic number.

It is not a de Polignac number, because 103031221 - 2⁵ = 103031189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103031231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23800 + ... + 27793.

It is an arithmetic number, because the mean of its divisors is an integer number (25771203).

Almost surely, 2^103031221 is an apocalyptic number.

It is an amenable number.

103031221 is a deficient number, since it is larger than the sum of its proper divisors (53591).

103031221 is an equidigital number, since it uses as much as digits as its factorization.

103031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53590.

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

The square root of 103031221 is about 10150.4295968200. The cubic root of 103031221 is about 468.8021724211.

Adding to 103031221 its reverse (122130301), we get a palindrome (225161522).

The spelling of 103031221 in words is "one hundred three million, thirty-one thousand, two hundred twenty-one".