1201210100989 has 2 divisors, whose sum is σ = 1201210100990. Its totient is φ = 1201210100988.

The previous prime is 1201210100953. The next prime is 1201210101001. The reversal of 1201210100989 is 9890010121021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608933636964 + 592276464025 = 780342^2 + 769595^2 .

It is an emirp because it is prime and its reverse (9890010121021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1201210100989 - 2⁹ = 1201210100477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201210100939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600605050494 + 600605050495.

It is an arithmetic number, because the mean of its divisors is an integer number (600605050495).

Almost surely, 2^{1201210100989} is an apocalyptic number.

It is an amenable number.

1201210100989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201210100989 is an equidigital number, since it uses as much as digits as its factorization.

1201210100989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 34.

The spelling of 1201210100989 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred thousand, nine hundred eighty-nine".