23121501 has 16 divisors (see below), whose sum is σ = 33747840. Its totient is φ = 13993920.

The previous prime is 23121491. The next prime is 23121517. The reversal of 23121501 is 10512132.

It is not a de Polignac number, because 23121501 - 2⁶ = 23121437 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121521) 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, 2481 + ... + 7238.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^23121501 is an apocalyptic number.

It is an amenable number.

23121501 is a deficient number, since it is larger than the sum of its proper divisors (10626339).

23121501 is a wasteful number, since it uses less digits than its factorization.

23121501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9796.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 23121501 is about 4808.4821929586. The cubic root of 23121501 is about 284.8865907653.

Adding to 23121501 its reverse (10512132), we get a palindrome (33633633).

The spelling of 23121501 in words is "twenty-three million, one hundred twenty-one thousand, five hundred one".