10506121 has 4 divisors (see below), whose sum is σ = 10610244. Its totient is φ = 10402000.

The previous prime is 10506079. The next prime is 10506169. The reversal of 10506121 is 12160501.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12160501 = 101 ⋅120401.

It can be written as a sum of positive squares in 2 ways, for example, as 9066121 + 1440000 = 3011^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 10506121 - 2¹¹ = 10504073 is a prime.

It is a super-2 number, since 2×10506121² = 220757156933282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10506095 and 10506104.

It is not an unprimeable number, because it can be changed into a prime (10506191) 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, 51910 + ... + 52111.

It is an arithmetic number, because the mean of its divisors is an integer number (2652561).

Almost surely, 2^10506121 is an apocalyptic number.

It is an amenable number.

10506121 is a deficient number, since it is larger than the sum of its proper divisors (104123).

10506121 is a wasteful number, since it uses less digits than its factorization.

10506121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104122.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 10506121 is about 3241.3147024009. The cubic root of 10506121 is about 219.0184995805.

Adding to 10506121 its reverse (12160501), we get a palindrome (22666622).

The spelling of 10506121 in words is "ten million, five hundred six thousand, one hundred twenty-one".