103013021 has 4 divisors (see below), whose sum is σ = 107491872. Its totient is φ = 98534172.

The previous prime is 103013011. The next prime is 103013051. The reversal of 103013021 is 120310301.

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: 120310301 = 211 ⋅570191.

It is a cyclic number.

It is not a de Polignac number, because 103013021 - 2¹⁸ = 102750877 is a prime.

It is a super-2 number, since 2×103013021² = 21223364991092882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103012993 and 103013011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103013011) 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, 2239391 + ... + 2239436.

It is an arithmetic number, because the mean of its divisors is an integer number (26872968).

Almost surely, 2^103013021 is an apocalyptic number.

It is an amenable number.

103013021 is a deficient number, since it is larger than the sum of its proper divisors (4478851).

103013021 is an equidigital number, since it uses as much as digits as its factorization.

103013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4478850.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 103013021 is about 10149.5330434459. The cubic root of 103013021 is about 468.7745668665.

Adding to 103013021 its reverse (120310301), we get a palindrome (223323322).

The spelling of 103013021 in words is "one hundred three million, thirteen thousand, twenty-one".