212103550521 has 24 divisors (see below), whose sum is σ = 311404818816. Its totient is φ = 139088638080.

The previous prime is 212103550441. The next prime is 212103550543. The reversal of 212103550521 is 125055301212.

212103550521 is a `hidden beast` number, since 2 + 1 + 2 + 103 + 550 + 5 + 2 + 1 = 666.

212103550521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 212103550521 - 2¹⁸ = 212103288377 is a prime.

It is a super-2 number, since 2×212103550521² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212103550621) 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 23 ways as a sum of consecutive naturals, for example, 106605 + ... + 659978.

It is an arithmetic number, because the mean of its divisors is an integer number (12975200784).

Almost surely, 2^212103550521 is an apocalyptic number.

It is an amenable number.

212103550521 is a deficient number, since it is larger than the sum of its proper divisors (99301268295).

212103550521 is a wasteful number, since it uses less digits than its factorization.

212103550521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 767093 (or 767090 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 212103550521 its reverse (125055301212), we get a palindrome (337158851733).

The spelling of 212103550521 in words is "two hundred twelve billion, one hundred three million, five hundred fifty thousand, five hundred twenty-one".