212685701 has 2 divisors, whose sum is σ = 212685702. Its totient is φ = 212685700.

The previous prime is 212685673. The next prime is 212685713. The reversal of 212685701 is 107586212.

212685701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131217025 + 81468676 = 11455^2 + 9026^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212685701 is a prime.

It is a super-2 number, since 2×212685701² = 90470414819722802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212685721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106342850 + 106342851.

It is an arithmetic number, because the mean of its divisors is an integer number (106342851).

Almost surely, 2^212685701 is an apocalyptic number.

It is an amenable number.

212685701 is a deficient number, since it is larger than the sum of its proper divisors (1).

212685701 is an equidigital number, since it uses as much as digits as its factorization.

212685701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 212685701 is about 14583.7478379188. The cubic root of 212685701 is about 596.9153736055.

The spelling of 212685701 in words is "two hundred twelve million, six hundred eighty-five thousand, seven hundred one".