212391301 has 2 divisors, whose sum is σ = 212391302. Its totient is φ = 212391300.

The previous prime is 212391287. The next prime is 212391349. The reversal of 212391301 is 103193212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141848100 + 70543201 = 11910^2 + 8399^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212391301 is a prime.

It is a super-2 number, since 2×212391301² = 90220129480945202, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212391391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106195650 + 106195651.

It is an arithmetic number, because the mean of its divisors is an integer number (106195651).

Almost surely, 2^212391301 is an apocalyptic number.

It is an amenable number.

212391301 is a deficient number, since it is larger than the sum of its proper divisors (1).

212391301 is an equidigital number, since it uses as much as digits as its factorization.

212391301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 212391301 is about 14573.6509152648. The cubic root of 212391301 is about 596.6398292532.

The spelling of 212391301 in words is "two hundred twelve million, three hundred ninety-one thousand, three hundred one".