23121001300020 has 72 divisors (see below), whose sum is σ = 70101781487136. Its totient is φ = 5691323394432.

The previous prime is 23121001299919. The next prime is 23121001300043. The reversal of 23121001300020 is 2000310012132.

It is a super-2 number, since 2×23121001300020² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1140078682 + ... + 1140098961.

It is an arithmetic number, because the mean of its divisors is an integer number (973635853988).

Almost surely, 2^{23121001300020} is an apocalyptic number.

23121001300020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121001300020 is an abundant number, since it is smaller than the sum of its proper divisors (46980780187116).

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

23121001300020 is a wasteful number, since it uses less digits than its factorization.

23121001300020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280177681 (or 2280177666 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 23121001300020 its reverse (2000310012132), we get a palindrome (25121311312152).

The spelling of 23121001300020 in words is "twenty-three trillion, one hundred twenty-one billion, one million, three hundred thousand, twenty".