10440121 has 4 divisors (see below), whose sum is σ = 10448244. Its totient is φ = 10432000.

The previous prime is 10440107. The next prime is 10440127. The reversal of 10440121 is 12104401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12104401 = 347 ⋅34883.

It can be written as a sum of positive squares in 2 ways, for example, as 10169721 + 270400 = 3189^2 + 520^2 .

It is a cyclic number.

It is not a de Polignac number, because 10440121 - 2⁹ = 10439609 is a prime.

It is a super-2 number, since 2×10440121² = 217992252989282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10440127) 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, 1660 + ... + 4861.

It is an arithmetic number, because the mean of its divisors is an integer number (2612061).

Almost surely, 2^10440121 is an apocalyptic number.

It is an amenable number.

10440121 is a deficient number, since it is larger than the sum of its proper divisors (8123).

10440121 is an equidigital number, since it uses as much as digits as its factorization.

10440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8122.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 10440121 is about 3231.1176085064. The cubic root of 10440121 is about 218.5589072933.

Adding to 10440121 its reverse (12104401), we get a palindrome (22544522).

The spelling of 10440121 in words is "ten million, four hundred forty thousand, one hundred twenty-one".