23121331015 has 8 divisors (see below), whose sum is σ = 29377691280. Its totient is φ = 17409002112.

The previous prime is 23121331001. The next prime is 23121331061. The reversal of 23121331015 is 51013312132.

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 23121331015 - 2¹⁵ = 23121298247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136007745 + ... + 136007914.

It is an arithmetic number, because the mean of its divisors is an integer number (3672211410).

Almost surely, 2^23121331015 is an apocalyptic number.

23121331015 is a deficient number, since it is larger than the sum of its proper divisors (6256360265).

23121331015 is a wasteful number, since it uses less digits than its factorization.

23121331015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272015681.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 23121331015 its reverse (51013312132), we get a palindrome (74134643147).

The spelling of 23121331015 in words is "twenty-three billion, one hundred twenty-one million, three hundred thirty-one thousand, fifteen".