212020868177 has 2 divisors, whose sum is σ = 212020868178. Its totient is φ = 212020868176.

The previous prime is 212020868173. The next prime is 212020868219. The reversal of 212020868177 is 771868020212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110851707136 + 101169161041 = 332944^2 + 318071^2 .

It is a cyclic number.

It is not a de Polignac number, because 212020868177 - 2² = 212020868173 is a prime.

It is a super-2 number, since 2×212020868177² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212020868173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106010434088 + 106010434089.

It is an arithmetic number, because the mean of its divisors is an integer number (106010434089).

Almost surely, 2^212020868177 is an apocalyptic number.

It is an amenable number.

212020868177 is a deficient number, since it is larger than the sum of its proper divisors (1).

212020868177 is an equidigital number, since it uses as much as digits as its factorization.

212020868177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528, while the sum is 44.

Adding to 212020868177 its reverse (771868020212), we get a palindrome (983888888389).

The spelling of 212020868177 in words is "two hundred twelve billion, twenty million, eight hundred sixty-eight thousand, one hundred seventy-seven".