23121442221400 has 48 divisors (see below), whose sum is σ = 53992101538800. Its totient is φ = 9208190071680.

The previous prime is 23121442221359. The next prime is 23121442221403. The reversal of 23121442221400 is 412224412132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121442221403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 252371692 + ... + 252463291.

It is an arithmetic number, because the mean of its divisors is an integer number (1124835448725).

Almost surely, 2^{23121442221400} is an apocalyptic number.

23121442221400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121442221400 is an abundant number, since it is smaller than the sum of its proper divisors (30870659317400).

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

23121442221400 is a wasteful number, since it uses less digits than its factorization.

23121442221400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504835228 (or 504835219 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 23121442221400 its reverse (412224412132), we get a palindrome (23533666633532).

The spelling of 23121442221400 in words is "twenty-three trillion, one hundred twenty-one billion, four hundred forty-two million, two hundred twenty-one thousand, four hundred".