201012212219989 has 2 divisors, whose sum is σ = 201012212219990. Its totient is φ = 201012212219988.

The previous prime is 201012212219953. The next prime is 201012212220031. The reversal of 201012212219989 is 989912212210102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108546871727889 + 92465340492100 = 10418583^2 + 9615890^2 .

It is a cyclic number.

It is not a de Polignac number, because 201012212219989 - 2⁹ = 201012212219477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201012212919989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100506106109994 + 100506106109995.

It is an arithmetic number, because the mean of its divisors is an integer number (100506106109995).

Almost surely, 2^{201012212219989} is an apocalyptic number.

It is an amenable number.

201012212219989 is a deficient number, since it is larger than the sum of its proper divisors (1).

201012212219989 is an equidigital number, since it uses as much as digits as its factorization.

201012212219989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 49.

The spelling of 201012212219989 in words is "two hundred one trillion, twelve billion, two hundred twelve million, two hundred nineteen thousand, nine hundred eighty-nine".