212867850077 has 2 divisors, whose sum is σ = 212867850078. Its totient is φ = 212867850076.

The previous prime is 212867850067. The next prime is 212867850127. The reversal of 212867850077 is 770058768212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212415904996 + 451945081 = 460886^2 + 21259^2 .

It is a cyclic number.

It is not a de Polignac number, because 212867850077 - 2²⁶ = 212800741213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212867850067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106433925038 + 106433925039.

It is an arithmetic number, because the mean of its divisors is an integer number (106433925039).

Almost surely, 2^212867850077 is an apocalyptic number.

It is an amenable number.

212867850077 is a deficient number, since it is larger than the sum of its proper divisors (1).

212867850077 is an equidigital number, since it uses as much as digits as its factorization.

212867850077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2634240, while the sum is 53.

The spelling of 212867850077 in words is "two hundred twelve billion, eight hundred sixty-seven million, eight hundred fifty thousand, seventy-seven".