23121045015 has 16 divisors (see below), whose sum is σ = 36995844096. Its totient is φ = 12330500000.

The previous prime is 23121044927. The next prime is 23121045043. The reversal of 23121045015 is 51054012132.

It is a happy number.

It is not a de Polignac number, because 23121045015 - 2⁸ = 23121044759 is a prime.

It is a super-3 number, since 3×23121045015³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 307390 + ... + 375140.

It is an arithmetic number, because the mean of its divisors is an integer number (2312240256).

Almost surely, 2^23121045015 is an apocalyptic number.

23121045015 is a deficient number, since it is larger than the sum of its proper divisors (13874799081).

23121045015 is a wasteful number, since it uses less digits than its factorization.

23121045015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90510.

The product of its (nonzero) digits is 1200, while the sum is 24.

Adding to 23121045015 its reverse (51054012132), we get a palindrome (74175057147).

The spelling of 23121045015 in words is "twenty-three billion, one hundred twenty-one million, forty-five thousand, fifteen".