23121335045020 has 192 divisors, whose sum is σ = 54092692684800. Its totient is φ = 8256812433408.

The previous prime is 23121335044987. The next prime is 23121335045033. The reversal of 23121335045020 is 2054053312132.

It is a super-2 number, since 2×23121335045020² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3276365332 + ... + 3276372388.

It is an arithmetic number, because the mean of its divisors is an integer number (281732774400).

Almost surely, 2^{23121335045020} is an apocalyptic number.

23121335045020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23121335045020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27046346342400).

23121335045020 is an abundant number, since it is smaller than the sum of its proper divisors (30971357639780).

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

23121335045020 is a wasteful number, since it uses less digits than its factorization.

23121335045020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10532 (or 10530 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 23121335045020 its reverse (2054053312132), we get a palindrome (25175388357152).

The spelling of 23121335045020 in words is "twenty-three trillion, one hundred twenty-one billion, three hundred thirty-five million, forty-five thousand, twenty".