212120000219989 has 2 divisors, whose sum is σ = 212120000219990. Its totient is φ = 212120000219988.

The previous prime is 212120000219893. The next prime is 212120000220071. The reversal of 212120000219989 is 989912000021212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194066492100625 + 18053508119364 = 13930775^2 + 4248942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212120000219989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212120000219489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106060000109994 + 106060000109995.

It is an arithmetic number, because the mean of its divisors is an integer number (106060000109995).

Almost surely, 2^{212120000219989} is an apocalyptic number.

It is an amenable number.

212120000219989 is a deficient number, since it is larger than the sum of its proper divisors (1).

212120000219989 is an equidigital number, since it uses as much as digits as its factorization.

212120000219989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 46.

The spelling of 212120000219989 in words is "two hundred twelve trillion, one hundred twenty billion, two hundred nineteen thousand, nine hundred eighty-nine".