213311129777 has 2 divisors, whose sum is σ = 213311129778. Its totient is φ = 213311129776.

The previous prime is 213311129723. The next prime is 213311129851. The reversal of 213311129777 is 777921113312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197843481616 + 15467648161 = 444796^2 + 124369^2 .

It is a cyclic number.

It is not a de Polignac number, because 213311129777 - 2¹⁰ = 213311128753 is a prime.

It is not a weakly prime, because it can be changed into another prime (213311123777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106655564888 + 106655564889.

It is an arithmetic number, because the mean of its divisors is an integer number (106655564889).

Almost surely, 2^213311129777 is an apocalyptic number.

It is an amenable number.

213311129777 is a deficient number, since it is larger than the sum of its proper divisors (1).

213311129777 is an equidigital number, since it uses as much as digits as its factorization.

213311129777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 111132, while the sum is 44.

The spelling of 213311129777 in words is "two hundred thirteen billion, three hundred eleven million, one hundred twenty-nine thousand, seven hundred seventy-seven".