122261189 has 2 divisors, whose sum is σ = 122261190. Its totient is φ = 122261188.

The previous prime is 122261177. The next prime is 122261233. The reversal of 122261189 is 981162221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120780100 + 1481089 = 10990^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 122261189 - 2⁴ = 122261173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122261119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61130594 + 61130595.

It is an arithmetic number, because the mean of its divisors is an integer number (61130595).

Almost surely, 2^122261189 is an apocalyptic number.

It is an amenable number.

122261189 is a deficient number, since it is larger than the sum of its proper divisors (1).

122261189 is an equidigital number, since it uses as much as digits as its factorization.

122261189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 32.

The square root of 122261189 is about 11057.1781662411. The cubic root of 122261189 is about 496.3212520066.

The spelling of 122261189 in words is "one hundred twenty-two million, two hundred sixty-one thousand, one hundred eighty-nine".