121252189 has 2 divisors, whose sum is σ = 121252190. Its totient is φ = 121252188.

The previous prime is 121252171. The next prime is 121252207. The reversal of 121252189 is 981252121.

It is a balanced prime because it is at equal distance from previous prime (121252171) and next prime (121252207).

It can be written as a sum of positive squares in only one way, i.e., 93605625 + 27646564 = 9675^2 + 5258^2 .

It is a cyclic number.

It is not a de Polignac number, because 121252189 - 2⁹ = 121251677 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 121252189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121252169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60626094 + 60626095.

It is an arithmetic number, because the mean of its divisors is an integer number (60626095).

Almost surely, 2^121252189 is an apocalyptic number.

It is an amenable number.

121252189 is a deficient number, since it is larger than the sum of its proper divisors (1).

121252189 is an equidigital number, since it uses as much as digits as its factorization.

121252189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 31.

The square root of 121252189 is about 11011.4571696938. The cubic root of 121252189 is about 494.9521281460.

The spelling of 121252189 in words is "one hundred twenty-one million, two hundred fifty-two thousand, one hundred eighty-nine".