210001212389 has 2 divisors, whose sum is σ = 210001212390. Its totient is φ = 210001212388.

The previous prime is 210001212301. The next prime is 210001212403. The reversal of 210001212389 is 983212100012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156829464289 + 53171748100 = 396017^2 + 230590^2 .

It is a cyclic number.

It is not a de Polignac number, because 210001212389 - 2¹² = 210001208293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210001218389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000606194 + 105000606195.

It is an arithmetic number, because the mean of its divisors is an integer number (105000606195).

Almost surely, 2^210001212389 is an apocalyptic number.

It is an amenable number.

210001212389 is a deficient number, since it is larger than the sum of its proper divisors (1).

210001212389 is an equidigital number, since it uses as much as digits as its factorization.

210001212389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 29.

The spelling of 210001212389 in words is "two hundred ten billion, one million, two hundred twelve thousand, three hundred eighty-nine".