121257071 has 8 divisors (see below), whose sum is σ = 132053040. Its totient is φ = 110670912.

The previous prime is 121257061. The next prime is 121257079. The reversal of 121257071 is 170752121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121257071 - 2⁶ = 121257007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121257071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121257079) 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 in 7 ways as a sum of consecutive naturals, for example, 51245 + ... + 53558.

It is an arithmetic number, because the mean of its divisors is an integer number (16506630).

Almost surely, 2^121257071 is an apocalyptic number.

121257071 is a deficient number, since it is larger than the sum of its proper divisors (10795969).

121257071 is a wasteful number, since it uses less digits than its factorization.

121257071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104905.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 121257071 is about 11011.6788456620. The cubic root of 121257071 is about 494.9587708408.

The spelling of 121257071 in words is "one hundred twenty-one million, two hundred fifty-seven thousand, seventy-one".