212101020021043 has 2 divisors, whose sum is σ = 212101020021044. Its totient is φ = 212101020021042.

The previous prime is 212101020020999. The next prime is 212101020021089. The reversal of 212101020021043 is 340120020101212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212101020021043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212101020021043.

It is not a weakly prime, because it can be changed into another prime (212101020021643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050510010521 + 106050510010522.

It is an arithmetic number, because the mean of its divisors is an integer number (106050510010522).

Almost surely, 2^{212101020021043} is an apocalyptic number.

212101020021043 is a deficient number, since it is larger than the sum of its proper divisors (1).

212101020021043 is an equidigital number, since it uses as much as digits as its factorization.

212101020021043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 212101020021043 its reverse (340120020101212), we get a palindrome (552221040122255).

The spelling of 212101020021043 in words is "two hundred twelve trillion, one hundred one billion, twenty million, twenty-one thousand, forty-three".