121139173 has 2 divisors, whose sum is σ = 121139174. Its totient is φ = 121139172.

The previous prime is 121139171. The next prime is 121139191. The reversal of 121139173 is 371931121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79691329 + 41447844 = 8927^2 + 6438^2 .

It is a cyclic number.

It is not a de Polignac number, because 121139173 - 2¹ = 121139171 is a prime.

It is a super-3 number, since 3×121139173³ (a number of 25 digits) contains 333 as substring.

Together with 121139171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121139171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60569586 + 60569587.

It is an arithmetic number, because the mean of its divisors is an integer number (60569587).

Almost surely, 2^121139173 is an apocalyptic number.

It is an amenable number.

121139173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121139173 is an equidigital number, since it uses as much as digits as its factorization.

121139173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134, while the sum is 28.

The square root of 121139173 is about 11006.3242274612. The cubic root of 121139173 is about 494.7983030248.

The spelling of 121139173 in words is "one hundred twenty-one million, one hundred thirty-nine thousand, one hundred seventy-three".