213020321177 has 2 divisors, whose sum is σ = 213020321178. Its totient is φ = 213020321176.

The previous prime is 213020321117. The next prime is 213020321219. The reversal of 213020321177 is 771123020312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185947238656 + 27073082521 = 431216^2 + 164539^2 .

It is a cyclic number.

It is not a de Polignac number, because 213020321177 - 2¹⁰ = 213020320153 is a prime.

It is not a weakly prime, because it can be changed into another prime (213020321117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106510160588 + 106510160589.

It is an arithmetic number, because the mean of its divisors is an integer number (106510160589).

Almost surely, 2^213020321177 is an apocalyptic number.

It is an amenable number.

213020321177 is a deficient number, since it is larger than the sum of its proper divisors (1).

213020321177 is an equidigital number, since it uses as much as digits as its factorization.

213020321177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3528, while the sum is 29.

Adding to 213020321177 its reverse (771123020312), we get a palindrome (984143341489).

The spelling of 213020321177 in words is "two hundred thirteen billion, twenty million, three hundred twenty-one thousand, one hundred seventy-seven".