23121261712 has 20 divisors (see below), whose sum is σ = 46242524416. Its totient is φ = 11187707040.

The previous prime is 23121261701. The next prime is 23121261719. The reversal of 23121261712 is 21716212132.

23121261712 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (23121261719) 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 3 ways as a sum of consecutive naturals, for example, 23307228 + ... + 23308219.

Almost surely, 2^23121261712 is an apocalyptic number.

It is an amenable number.

23121261712 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23121261712 is a wasteful number, since it uses less digits than its factorization.

23121261712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46615486 (or 46615480 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

Adding to 23121261712 its reverse (21716212132), we get a palindrome (44837473844).

The spelling of 23121261712 in words is "twenty-three billion, one hundred twenty-one million, two hundred sixty-one thousand, seven hundred twelve".