21060117 has 12 divisors (see below), whose sum is σ = 32760364. Its totient is φ = 12960000.

The previous prime is 21060097. The next prime is 21060131. The reversal of 21060117 is 71106012.

It can be written as a sum of positive squares in 2 ways, for example, as 13883076 + 7177041 = 3726^2 + 2679^2 .

It is not a de Polignac number, because 21060117 - 2²² = 16865813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21060117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21060187) 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, 89884 + ... + 90117.

Almost surely, 2^21060117 is an apocalyptic number.

It is an amenable number.

21060117 is a deficient number, since it is larger than the sum of its proper divisors (11700247).

21060117 is a wasteful number, since it uses less digits than its factorization.

21060117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180020 (or 180017 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 21060117 is about 4589.1303097646. The cubic root of 21060117 is about 276.1554338725.

Adding to 21060117 its reverse (71106012), we get a palindrome (92166129).

The spelling of 21060117 in words is "twenty-one million, sixty thousand, one hundred seventeen".