10212021209989 has 2 divisors, whose sum is σ = 10212021209990. Its totient is φ = 10212021209988.

The previous prime is 10212021209981. The next prime is 10212021210047. The reversal of 10212021209989 is 98990212021201.

It is a happy number.

10212021209989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6693433085889 + 3518588124100 = 2587167^2 + 1875790^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212021209989 - 2³ = 10212021209981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10212021209981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106010604994 + 5106010604995.

It is an arithmetic number, because the mean of its divisors is an integer number (5106010604995).

Almost surely, 2^{10212021209989} is an apocalyptic number.

It is an amenable number.

10212021209989 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212021209989 is an equidigital number, since it uses as much as digits as its factorization.

10212021209989 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 10212021209989 in words is "ten trillion, two hundred twelve billion, twenty-one million, two hundred nine thousand, nine hundred eighty-nine".