23121222013000 has 64 divisors (see below), whose sum is σ = 54168925215600. Its totient is φ = 9237332275200.

The previous prime is 23121222012937. The next prime is 23121222013007. The reversal of 23121222013000 is 31022212132.

It can be written as a sum of positive squares in 8 ways, for example, as 496492162884 + 22624729850116 = 704622^2 + 4756546^2 .

It is not an unprimeable number, because it can be changed into a prime (23121222013007) by changing a digit.

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, 13116249 + ... + 14774248.

Almost surely, 2^{23121222013000} is an apocalyptic number.

23121222013000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121222013000 is an abundant number, since it is smaller than the sum of its proper divisors (31047703202600).

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

23121222013000 is a wasteful number, since it uses less digits than its factorization.

23121222013000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27891347 (or 27891333 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 23121222013000 its reverse (31022212132), we get a palindrome (23152244225132).

The spelling of 23121222013000 in words is "twenty-three trillion, one hundred twenty-one billion, two hundred twenty-two million, thirteen thousand".