122171149 has 2 divisors, whose sum is σ = 122171150. Its totient is φ = 122171148.

The previous prime is 122171143. The next prime is 122171167. The reversal of 122171149 is 941171221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 101404900 + 20766249 = 10070^2 + 4557^2 .

It is a cyclic number.

It is not a de Polignac number, because 122171149 - 2³ = 122171141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122171141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61085574 + 61085575.

It is an arithmetic number, because the mean of its divisors is an integer number (61085575).

Almost surely, 2^122171149 is an apocalyptic number.

It is an amenable number.

122171149 is a deficient number, since it is larger than the sum of its proper divisors (1).

122171149 is an equidigital number, since it uses as much as digits as its factorization.

122171149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 28.

The square root of 122171149 is about 11053.1058531075. The cubic root of 122171149 is about 496.1993824779.

It can be divided in two parts, 12217 and 1149, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 122171149 in words is "one hundred twenty-two million, one hundred seventy-one thousand, one hundred forty-nine".