212242043331521 has 16 divisors (see below), whose sum is σ = 246168574848000. Its totient is φ = 179229282466128.

The previous prime is 212242043331497. The next prime is 212242043331631. The reversal of 212242043331521 is 125133340242212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212242043331521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212242043337521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 508572371 + ... + 508989528.

It is an arithmetic number, because the mean of its divisors is an integer number (15385535928000).

Almost surely, 2^{212242043331521} is an apocalyptic number.

It is an amenable number.

212242043331521 is a deficient number, since it is larger than the sum of its proper divisors (33926531516479).

212242043331521 is a wasteful number, since it uses less digits than its factorization.

212242043331521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017562348.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 212242043331521 its reverse (125133340242212), we get a palindrome (337375383573733).

The spelling of 212242043331521 in words is "two hundred twelve trillion, two hundred forty-two billion, forty-three million, three hundred thirty-one thousand, five hundred twenty-one".