121220201189 has 2 divisors, whose sum is σ = 121220201190. Its totient is φ = 121220201188.

The previous prime is 121220201147. The next prime is 121220201197. The reversal of 121220201189 is 981102022121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114266309089 + 6953892100 = 338033^2 + 83390^2 .

It is a cyclic number.

It is not a de Polignac number, because 121220201189 - 2¹⁶ = 121220135653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121220201119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610100594 + 60610100595.

It is an arithmetic number, because the mean of its divisors is an integer number (60610100595).

Almost surely, 2^121220201189 is an apocalyptic number.

It is an amenable number.

121220201189 is a deficient number, since it is larger than the sum of its proper divisors (1).

121220201189 is an equidigital number, since it uses as much as digits as its factorization.

121220201189 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 29.

The spelling of 121220201189 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred one thousand, one hundred eighty-nine".