1010212221989 has 2 divisors, whose sum is σ = 1010212221990. Its totient is φ = 1010212221988.

The previous prime is 1010212221979. The next prime is 1010212222067. The reversal of 1010212221989 is 9891222120101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871338237025 + 138873984964 = 933455^2 + 372658^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010212221989 is a prime.

It is a super-2 number, since 2×1010212221989² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010212221959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505106110994 + 505106110995.

It is an arithmetic number, because the mean of its divisors is an integer number (505106110995).

Almost surely, 2^{1010212221989} is an apocalyptic number.

It is an amenable number.

1010212221989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010212221989 is an equidigital number, since it uses as much as digits as its factorization.

1010212221989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 1010212221989 in words is "one trillion, ten billion, two hundred twelve million, two hundred twenty-one thousand, nine hundred eighty-nine".