10121813 has 16 divisors (see below), whose sum is σ = 11753280. Its totient is φ = 8636544.

The previous prime is 10121803. The next prime is 10121819. The reversal of 10121813 is 31812101.

10121813 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 10121813 - 2¹² = 10117717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121791 and 10121800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10145 + ... + 11097.

It is an arithmetic number, because the mean of its divisors is an integer number (734580).

Almost surely, 2^10121813 is an apocalyptic number.

10121813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

10121813 is a deficient number, since it is larger than the sum of its proper divisors (1631467).

10121813 is a wasteful number, since it uses less digits than its factorization.

10121813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028.

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 10121813 is about 3181.4796871896. The cubic root of 10121813 is about 216.3147346487.

Adding to 10121813 its reverse (31812101), we get a palindrome (41933914).

The spelling of 10121813 in words is "ten million, one hundred twenty-one thousand, eight hundred thirteen".