121211010212189 has 2 divisors, whose sum is σ = 121211010212190. Its totient is φ = 121211010212188.

The previous prime is 121211010212129. The next prime is 121211010212203. The reversal of 121211010212189 is 981212010112121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 95545053331225 + 25665956880964 = 9774715^2 + 5066158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121211010212189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121211010212129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60605505106094 + 60605505106095.

It is an arithmetic number, because the mean of its divisors is an integer number (60605505106095).

Almost surely, 2^{121211010212189} is an apocalyptic number.

It is an amenable number.

121211010212189 is a deficient number, since it is larger than the sum of its proper divisors (1).

121211010212189 is an equidigital number, since it uses as much as digits as its factorization.

121211010212189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 32.

The spelling of 121211010212189 in words is "one hundred twenty-one trillion, two hundred eleven billion, ten million, two hundred twelve thousand, one hundred eighty-nine".