2315122122521 has 8 divisors (see below), whose sum is σ = 2573634518784. Its totient is φ = 2068099166160.

The previous prime is 2315122122433. The next prime is 2315122122527. The reversal of 2315122122521 is 1252212215132.

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 2315122122521 - 2¹⁸ = 2315121860377 is a prime.

It is a super-2 number, since 2×2315122122521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2315122122527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2872359551 + ... + 2872360356.

It is an arithmetic number, because the mean of its divisors is an integer number (321704314848).

Almost surely, 2^{2315122122521} is an apocalyptic number.

It is an amenable number.

2315122122521 is a deficient number, since it is larger than the sum of its proper divisors (258512396263).

2315122122521 is a wasteful number, since it uses less digits than its factorization.

2315122122521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5744719951.

The product of its digits is 4800, while the sum is 29.

Adding to 2315122122521 its reverse (1252212215132), we get a palindrome (3567334337653).

The spelling of 2315122122521 in words is "two trillion, three hundred fifteen billion, one hundred twenty-two million, one hundred twenty-two thousand, five hundred twenty-one".