10391121 has 12 divisors (see below), whose sum is σ = 16164148. Its totient is φ = 6394464.

The previous prime is 10391093. The next prime is 10391137. The reversal of 10391121 is 12119301.

10391121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7096896 + 3294225 = 2664^2 + 1815^2 .

It is not a de Polignac number, because 10391121 - 2⁶ = 10391057 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10391094 and 10391103.

It is not an unprimeable number, because it can be changed into a prime (10391221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44290 + ... + 44523.

Almost surely, 2^10391121 is an apocalyptic number.

It is an amenable number.

10391121 is a deficient number, since it is larger than the sum of its proper divisors (5773027).

10391121 is a wasteful number, since it uses less digits than its factorization.

10391121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88832 (or 88829 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 10391121 is about 3223.5261748588. The cubic root of 10391121 is about 218.2164404810.

The spelling of 10391121 in words is "ten million, three hundred ninety-one thousand, one hundred twenty-one".