212021243042443 has 16 divisors (see below), whose sum is σ = 224650978060032. Its totient is φ = 199820010960000.

The previous prime is 212021243042417. The next prime is 212021243042489. The reversal of 212021243042443 is 344240342120212.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212021243042443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021243042399 and 212021243042408.

It is not an unprimeable number, because it can be changed into a prime (212021243042143) 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, 554864596 + ... + 555246577.

It is an arithmetic number, because the mean of its divisors is an integer number (14040686128752).

Almost surely, 2^{212021243042443} is an apocalyptic number.

212021243042443 is a deficient number, since it is larger than the sum of its proper divisors (12629735017589).

212021243042443 is a wasteful number, since it uses less digits than its factorization.

212021243042443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110111366.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 212021243042443 its reverse (344240342120212), we get a palindrome (556261585162655).

The spelling of 212021243042443 in words is "two hundred twelve trillion, twenty-one billion, two hundred forty-three million, forty-two thousand, four hundred forty-three".