213012209989 has 2 divisors, whose sum is σ = 213012209990. Its totient is φ = 213012209988.

The previous prime is 213012209911. The next prime is 213012210049. The reversal of 213012209989 is 989902210312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150303536100 + 62708673889 = 387690^2 + 250417^2 .

It is a cyclic number.

It is not a de Polignac number, because 213012209989 - 2¹⁵ = 213012177221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213012209909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106506104994 + 106506104995.

It is an arithmetic number, because the mean of its divisors is an integer number (106506104995).

Almost surely, 2^213012209989 is an apocalyptic number.

It is an amenable number.

213012209989 is a deficient number, since it is larger than the sum of its proper divisors (1).

213012209989 is an equidigital number, since it uses as much as digits as its factorization.

213012209989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 46.

The spelling of 213012209989 in words is "two hundred thirteen billion, twelve million, two hundred nine thousand, nine hundred eighty-nine".