212130112177 has 2 divisors, whose sum is σ = 212130112178. Its totient is φ = 212130112176.

The previous prime is 212130112169. The next prime is 212130112213. The reversal of 212130112177 is 771211031212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209023610481 + 3106501696 = 457191^2 + 55736^2 .

It is a cyclic number.

It is not a de Polignac number, because 212130112177 - 2³ = 212130112169 is a prime.

It is not a weakly prime, because it can be changed into another prime (212130115177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106065056088 + 106065056089.

It is an arithmetic number, because the mean of its divisors is an integer number (106065056089).

Almost surely, 2^212130112177 is an apocalyptic number.

It is an amenable number.

212130112177 is a deficient number, since it is larger than the sum of its proper divisors (1).

212130112177 is an equidigital number, since it uses as much as digits as its factorization.

212130112177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1176, while the sum is 28.

Adding to 212130112177 its reverse (771211031212), we get a palindrome (983341143389).

The spelling of 212130112177 in words is "two hundred twelve billion, one hundred thirty million, one hundred twelve thousand, one hundred seventy-seven".