558120121 has 8 divisors (see below), whose sum is σ = 602486024. Its totient is φ = 513959040.

The previous prime is 558120097. The next prime is 558120161. The reversal of 558120121 is 121021855.

It can be written as a sum of positive squares in 4 ways, for example, as 77633721 + 480486400 = 8811^2 + 21920^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 558120121 - 2⁵ = 558120089 is a prime.

It is a super-2 number, since 2×558120121² = 622996138930109282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (558120161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45516 + ... + 56461.

It is an arithmetic number, because the mean of its divisors is an integer number (75310753).

Almost surely, 2^558120121 is an apocalyptic number.

It is an amenable number.

558120121 is a deficient number, since it is larger than the sum of its proper divisors (44365903).

558120121 is a wasteful number, since it uses less digits than its factorization.

558120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102411.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 558120121 is about 23624.5660489246. The cubic root of 558120121 is about 823.3337024408. Note that the first 3 decimals are identical.

Adding to 558120121 its reverse (121021855), we get a palindrome (679141976).

The spelling of 558120121 in words is "five hundred fifty-eight million, one hundred twenty thousand, one hundred twenty-one".