336120021 has 24 divisors (see below), whose sum is σ = 493065144. Its totient is φ = 220617600.

The previous prime is 336119989. The next prime is 336120023. The reversal of 336120021 is 120021633.

336120021 is a `hidden beast` number, since 33 + 612 + 0 + 0 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 258855921 + 77264100 = 16089^2 + 8790^2 .

It is not a de Polignac number, because 336120021 - 2⁵ = 336119989 is a prime.

It is a super-2 number, since 2×336120021² = 225953337034080882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 336119976 and 336120003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (336120023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178135 + ... + 180011.

It is an arithmetic number, because the mean of its divisors is an integer number (20544381).

Almost surely, 2^336120021 is an apocalyptic number.

It is an amenable number.

336120021 is a deficient number, since it is larger than the sum of its proper divisors (156945123).

336120021 is a wasteful number, since it uses less digits than its factorization.

336120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181 (or 2178 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 336120021 is about 18333.5763286927. The cubic root of 336120021 is about 695.2880961457.

Adding to 336120021 its reverse (120021633), we get a palindrome (456141654).

The spelling of 336120021 in words is "three hundred thirty-six million, one hundred twenty thousand, twenty-one".