521311420124 has 36 divisors (see below), whose sum is σ = 1002907490592. Its totient is φ = 236927370240.

The previous prime is 521311420093. The next prime is 521311420151. The reversal of 521311420124 is 421024113125.

It is a happy number.

It is a super-5 number, since 5×521311420124⁵ (a number of 60 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521311420093 and 521311420102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3670172 + ... + 3809564.

Almost surely, 2^521311420124 is an apocalyptic number.

It is an amenable number.

521311420124 is a deficient number, since it is larger than the sum of its proper divisors (481596070468).

521311420124 is a wasteful number, since it uses less digits than its factorization.

521311420124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147146 (or 147133 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 521311420124 its reverse (421024113125), we get a palindrome (942335533249).

The spelling of 521311420124 in words is "five hundred twenty-one billion, three hundred eleven million, four hundred twenty thousand, one hundred twenty-four".