521211121112125 has 32 divisors (see below), whose sum is σ = 656967466321920. Its totient is φ = 412805502360000.

The previous prime is 521211121112119. The next prime is 521211121112203.

521211121112125 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 521211121112125 - 2¹⁷ = 521211120981053 is a prime.

It is a super-2 number, since 2×521211121112125² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521211121112093 and 521211121112102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147723814 + ... + 151210936.

It is an arithmetic number, because the mean of its divisors is an integer number (20530233322560).

Almost surely, 2^{521211121112125} is an apocalyptic number.

It is an amenable number.

521211121112125 is a deficient number, since it is larger than the sum of its proper divisors (135756345209795).

521211121112125 is a wasteful number, since it uses less digits than its factorization.

521211121112125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499078 (or 3499068 counting only the distinct ones).

The product of its digits is 800, while the sum is 28.

The spelling of 521211121112125 in words is "five hundred twenty-one trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twenty-five".