523356642121 has 4 divisors (see below), whose sum is σ = 523449425044. Its totient is φ = 523263859200.

The previous prime is 523356642119. The next prime is 523356642139. The reversal of 523356642121 is 121246653325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 394880276025 + 128476366096 = 628395^2 + 358436^2 .

It is a cyclic number.

It is not a de Polignac number, because 523356642121 - 2¹ = 523356642119 is a prime.

It is a super-3 number, since 3×523356642121³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523356642521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46383000 + ... + 46394281.

It is an arithmetic number, because the mean of its divisors is an integer number (130862356261).

Almost surely, 2^523356642121 is an apocalyptic number.

It is an amenable number.

523356642121 is a deficient number, since it is larger than the sum of its proper divisors (92782923).

523356642121 is an equidigital number, since it uses as much as digits as its factorization.

523356642121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92782922.

The product of its digits is 259200, while the sum is 40.

The spelling of 523356642121 in words is "five hundred twenty-three billion, three hundred fifty-six million, six hundred forty-two thousand, one hundred twenty-one".