103113021 has 16 divisors (see below), whose sum is σ = 151472448. Its totient is φ = 61872000.

The previous prime is 103112987. The next prime is 103113077. The reversal of 103113021 is 120311301.

It is not a de Polignac number, because 103113021 - 2¹⁸ = 102850877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103112988 and 103113006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103113221) 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 15 ways as a sum of consecutive naturals, for example, 12136 + ... + 18801.

It is an arithmetic number, because the mean of its divisors is an integer number (9467028).

Almost surely, 2^103113021 is an apocalyptic number.

103113021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103113021 is a deficient number, since it is larger than the sum of its proper divisors (48359427).

103113021 is a wasteful number, since it uses less digits than its factorization.

103113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31052.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 103113021 is about 10154.4581834778. The cubic root of 103113021 is about 468.9262056129.

Adding to 103113021 its reverse (120311301), we get a palindrome (223424322).

The spelling of 103113021 in words is "one hundred three million, one hundred thirteen thousand, twenty-one".