23121515255233 has 16 divisors (see below), whose sum is σ = 23970832049664. Its totient is φ = 22284053112960.

The previous prime is 23121515255221. The next prime is 23121515255243. The reversal of 23121515255233 is 33255251512132.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23121515255233 is a prime.

It is a super-2 number, since 2×23121515255233² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23121515255243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38568048 + ... + 39162958.

It is an arithmetic number, because the mean of its divisors is an integer number (1498177003104).

Almost surely, 2^{23121515255233} is an apocalyptic number.

It is an amenable number.

23121515255233 is a deficient number, since it is larger than the sum of its proper divisors (849316794431).

23121515255233 is a wasteful number, since it uses less digits than its factorization.

23121515255233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604872.

The product of its digits is 270000, while the sum is 40.

Adding to 23121515255233 its reverse (33255251512132), we get a palindrome (56376766767365).

The spelling of 23121515255233 in words is "twenty-three trillion, one hundred twenty-one billion, five hundred fifteen million, two hundred fifty-five thousand, two hundred thirty-three".