23121071 has 16 divisors (see below), whose sum is σ = 25659648. Its totient is φ = 20736000.

The previous prime is 23121053. The next prime is 23121073. The reversal of 23121071 is 17012132.

It is a cyclic number.

It is not a de Polignac number, because 23121071 - 2²² = 18926767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121073) 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 in 15 ways as a sum of consecutive naturals, for example, 38171 + ... + 38771.

It is an arithmetic number, because the mean of its divisors is an integer number (1603728).

Almost surely, 2^23121071 is an apocalyptic number.

23121071 is a deficient number, since it is larger than the sum of its proper divisors (2538577).

23121071 is a wasteful number, since it uses less digits than its factorization.

23121071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722.

The product of its (nonzero) digits is 84, while the sum is 17.

The square root of 23121071 is about 4808.4374800968. The cubic root of 23121071 is about 284.8848247036.

The spelling of 23121071 in words is "twenty-three million, one hundred twenty-one thousand, seventy-one".