212434413021 has 64 divisors (see below), whose sum is σ = 336853440000. Its totient is φ = 132019683840.

The previous prime is 212434413019. The next prime is 212434413047. The reversal of 212434413021 is 120314434212.

212434413021 is a `hidden beast` number, since 2 + 1 + 243 + 4 + 413 + 0 + 2 + 1 = 666.

It is not a de Polignac number, because 212434413021 - 2¹ = 212434413019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212434483021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4103305 + ... + 4154753.

It is an arithmetic number, because the mean of its divisors is an integer number (5263335000).

Almost surely, 2^212434413021 is an apocalyptic number.

It is an amenable number.

212434413021 is a deficient number, since it is larger than the sum of its proper divisors (124419026979).

212434413021 is a wasteful number, since it uses less digits than its factorization.

212434413021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51651 (or 51645 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 212434413021 its reverse (120314434212), we get a palindrome (332748847233).

The spelling of 212434413021 in words is "two hundred twelve billion, four hundred thirty-four million, four hundred thirteen thousand, twenty-one".