213042421061 has 2 divisors, whose sum is σ = 213042421062. Its totient is φ = 213042421060.

The previous prime is 213042420979. The next prime is 213042421079. The reversal of 213042421061 is 160124240312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191816844961 + 21225576100 = 437969^2 + 145690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213042421061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213042421061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213042421961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106521210530 + 106521210531.

It is an arithmetic number, because the mean of its divisors is an integer number (106521210531).

Almost surely, 2^213042421061 is an apocalyptic number.

It is an amenable number.

213042421061 is a deficient number, since it is larger than the sum of its proper divisors (1).

213042421061 is an equidigital number, since it uses as much as digits as its factorization.

213042421061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 213042421061 its reverse (160124240312), we get a palindrome (373166661373).

The spelling of 213042421061 in words is "two hundred thirteen billion, forty-two million, four hundred twenty-one thousand, sixty-one".