212100071 has 2 divisors, whose sum is σ = 212100072. Its totient is φ = 212100070.

The previous prime is 212100067. The next prime is 212100073. The reversal of 212100071 is 170001212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212100071 - 2² = 212100067 is a prime.

Together with 212100073, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212100073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050035 + 106050036.

It is an arithmetic number, because the mean of its divisors is an integer number (106050036).

Almost surely, 2^212100071 is an apocalyptic number.

212100071 is a deficient number, since it is larger than the sum of its proper divisors (1).

212100071 is an equidigital number, since it uses as much as digits as its factorization.

212100071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 212100071 is about 14563.6558253757. The cubic root of 212100071 is about 596.3670012284.

Adding to 212100071 its reverse (170001212), we get a palindrome (382101283).

The spelling of 212100071 in words is "two hundred twelve million, one hundred thousand, seventy-one".