103313021 has 6 divisors (see below), whose sum is σ = 120180510. Its totient is φ = 88553976.

The previous prime is 103312997. The next prime is 103313027. The reversal of 103313021 is 120313301.

It can be written as a sum of positive squares in only one way, i.e., 103022500 + 290521 = 10150^2 + 539^2 .

It is a de Polignac number, because none of the positive numbers 2^k-103313021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103312987 and 103313005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103313027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1054166 + ... + 1054263.

It is an arithmetic number, because the mean of its divisors is an integer number (20030085).

Almost surely, 2^103313021 is an apocalyptic number.

It is an amenable number.

103313021 is a deficient number, since it is larger than the sum of its proper divisors (16867489).

103313021 is an equidigital number, since it uses as much as digits as its factorization.

103313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108443 (or 2108436 counting only the distinct ones).

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

The square root of 103313021 is about 10164.3013040740. The cubic root of 103313021 is about 469.2291892373.

Adding to 103313021 its reverse (120313301), we get a palindrome (223626322).

The spelling of 103313021 in words is "one hundred three million, three hundred thirteen thousand, twenty-one".