212660068891 has 2 divisors, whose sum is σ = 212660068892. Its totient is φ = 212660068890.

The previous prime is 212660068883. The next prime is 212660069033. The reversal of 212660068891 is 198860066212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212660068891 - 2³ = 212660068883 is a prime.

It is not a weakly prime, because it can be changed into another prime (212660068801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106330034445 + 106330034446.

It is an arithmetic number, because the mean of its divisors is an integer number (106330034446).

Almost surely, 2^212660068891 is an apocalyptic number.

212660068891 is a deficient number, since it is larger than the sum of its proper divisors (1).

212660068891 is an equidigital number, since it uses as much as digits as its factorization.

212660068891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 49.

The spelling of 212660068891 in words is "two hundred twelve billion, six hundred sixty million, sixty-eight thousand, eight hundred ninety-one".