121265173 has 2 divisors, whose sum is σ = 121265174. Its totient is φ = 121265172.

The previous prime is 121265171. The next prime is 121265257. The reversal of 121265173 is 371562121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64609444 + 56655729 = 8038^2 + 7527^2 .

It is a cyclic number.

It is not a de Polignac number, because 121265173 - 2¹ = 121265171 is a prime.

Together with 121265171, 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 (121265171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60632586 + 60632587.

It is an arithmetic number, because the mean of its divisors is an integer number (60632587).

Almost surely, 2^121265173 is an apocalyptic number.

It is an amenable number.

121265173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121265173 is an equidigital number, since it uses as much as digits as its factorization.

121265173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 28.

The square root of 121265173 is about 11012.0467216590. The cubic root of 121265173 is about 494.9697944361.

The spelling of 121265173 in words is "one hundred twenty-one million, two hundred sixty-five thousand, one hundred seventy-three".