521336052121 has 8 divisors (see below), whose sum is σ = 523038492288. Its totient is φ = 519633780000.

The previous prime is 521336052119. The next prime is 521336052131. The reversal of 521336052121 is 121250633125.

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 521336052121 - 2¹ = 521336052119 is a prime.

It is a super-2 number, since 2×521336052121² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521336052101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10287796 + ... + 10338346.

It is an arithmetic number, because the mean of its divisors is an integer number (65379811536).

Almost surely, 2^521336052121 is an apocalyptic number.

It is an amenable number.

521336052121 is a deficient number, since it is larger than the sum of its proper divisors (1702440167).

521336052121 is a wasteful number, since it uses less digits than its factorization.

521336052121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84023.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 521336052121 its reverse (121250633125), we get a palindrome (642586685246).

The spelling of 521336052121 in words is "five hundred twenty-one billion, three hundred thirty-six million, fifty-two thousand, one hundred twenty-one".