121611071 has 4 divisors (see below), whose sum is σ = 121633200. Its totient is φ = 121588944.

The previous prime is 121611059. The next prime is 121611073. The reversal of 121611071 is 170116121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 121611071 - 2²⁶ = 54502207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121611073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4190 + ... + 16148.

It is an arithmetic number, because the mean of its divisors is an integer number (30408300).

Almost surely, 2^121611071 is an apocalyptic number.

121611071 is a deficient number, since it is larger than the sum of its proper divisors (22129).

121611071 is a wasteful number, since it uses less digits than its factorization.

121611071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22128.

The product of its (nonzero) digits is 84, while the sum is 20.

The square root of 121611071 is about 11027.7409744698. The cubic root of 121611071 is about 495.4399666190.

Adding to 121611071 its reverse (170116121), we get a palindrome (291727192).

The spelling of 121611071 in words is "one hundred twenty-one million, six hundred eleven thousand, seventy-one".