103331021 has 4 divisors (see below), whose sum is σ = 105734112. Its totient is φ = 100927932.

The previous prime is 103330993. The next prime is 103331023. The reversal of 103331021 is 120133301.

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: 120133301 = 23 ⋅5223187.

It is a cyclic number.

It is not a de Polignac number, because 103331021 - 2¹⁰ = 103329997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103330987 and 103331005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103331023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1201481 + ... + 1201566.

It is an arithmetic number, because the mean of its divisors is an integer number (26433528).

Almost surely, 2^103331021 is an apocalyptic number.

It is an amenable number.

103331021 is a deficient number, since it is larger than the sum of its proper divisors (2403091).

103331021 is an equidigital number, since it uses as much as digits as its factorization.

103331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2403090.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 103331021 is about 10165.1867174194. The cubic root of 103331021 is about 469.2564385774.

Adding to 103331021 its reverse (120133301), we get a palindrome (223464322).

The spelling of 103331021 in words is "one hundred three million, three hundred thirty-one thousand, twenty-one".