10509121 has 4 divisors (see below), whose sum is σ = 12010432. Its totient is φ = 9007812.

The previous prime is 10509101. The next prime is 10509131. The reversal of 10509121 is 12190501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12190501 = 37 ⋅329473.

It is a cyclic number.

It is not a de Polignac number, because 10509121 - 2⁹ = 10508609 is a prime.

It is a super-2 number, since 2×10509121² = 220883248385282, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10509101) 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, 750645 + ... + 750658.

It is an arithmetic number, because the mean of its divisors is an integer number (3002608).

Almost surely, 2^10509121 is an apocalyptic number.

It is an amenable number.

10509121 is a deficient number, since it is larger than the sum of its proper divisors (1501311).

10509121 is an equidigital number, since it uses as much as digits as its factorization.

10509121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501310.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 10509121 is about 3241.7774445511. Note that the first 3 decimals coincide. The cubic root of 10509121 is about 219.0393443487.

Adding to 10509121 its reverse (12190501), we get a palindrome (22699622).

The spelling of 10509121 in words is "ten million, five hundred nine thousand, one hundred twenty-one".