121021021100989 has 2 divisors, whose sum is σ = 121021021100990. Its totient is φ = 121021021100988.

The previous prime is 121021021100953. The next prime is 121021021101007. The reversal of 121021021100989 is 989001120120121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110668927204900 + 10352093896089 = 10519930^2 + 3217467^2 .

It is a cyclic number.

It is not a de Polignac number, because 121021021100989 - 2²³ = 121021012712381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121021021100689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510510550494 + 60510510550495.

It is an arithmetic number, because the mean of its divisors is an integer number (60510510550495).

Almost surely, 2^{121021021100989} is an apocalyptic number.

It is an amenable number.

121021021100989 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021021100989 is an equidigital number, since it uses as much as digits as its factorization.

121021021100989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 37.

The spelling of 121021021100989 in words is "one hundred twenty-one trillion, twenty-one billion, twenty-one million, one hundred thousand, nine hundred eighty-nine".