212102011871 has 2 divisors, whose sum is σ = 212102011872. Its totient is φ = 212102011870.

The previous prime is 212102011867. The next prime is 212102011879. The reversal of 212102011871 is 178110201212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212102011871 - 2² = 212102011867 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212102011871.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212102011879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051005935 + 106051005936.

It is an arithmetic number, because the mean of its divisors is an integer number (106051005936).

Almost surely, 2^212102011871 is an apocalyptic number.

212102011871 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102011871 is an equidigital number, since it uses as much as digits as its factorization.

212102011871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 26.

The spelling of 212102011871 in words is "two hundred twelve billion, one hundred two million, eleven thousand, eight hundred seventy-one".