213012299989 has 2 divisors, whose sum is σ = 213012299990. Its totient is φ = 213012299988.

The previous prime is 213012299987. The next prime is 213012300001. The reversal of 213012299989 is 989992210312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195511655889 + 17500644100 = 442167^2 + 132290^2 .

It is a cyclic number.

It is not a de Polignac number, because 213012299989 - 2¹ = 213012299987 is a prime.

Together with 213012299987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213012299987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106506149994 + 106506149995.

It is an arithmetic number, because the mean of its divisors is an integer number (106506149995).

Almost surely, 2^213012299989 is an apocalyptic number.

It is an amenable number.

213012299989 is a deficient number, since it is larger than the sum of its proper divisors (1).

213012299989 is an equidigital number, since it uses as much as digits as its factorization.

213012299989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 55.

The spelling of 213012299989 in words is "two hundred thirteen billion, twelve million, two hundred ninety-nine thousand, nine hundred eighty-nine".