21124222023400 has 96 divisors (see below), whose sum is σ = 52499180462400. Its totient is φ = 7885181427200.

The previous prime is 21124222023361. The next prime is 21124222023433. The reversal of 21124222023400 is 432022242112.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55814110 + ... + 56191309.

It is an arithmetic number, because the mean of its divisors is an integer number (546866463150).

Almost surely, 2^{21124222023400} is an apocalyptic number.

21124222023400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21124222023400 is an abundant number, since it is smaller than the sum of its proper divisors (31374958439000).

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

21124222023400 is a wasteful number, since it uses less digits than its factorization.

21124222023400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112005499 (or 112005490 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21124222023400 its reverse (432022242112), we get a palindrome (21556244265512).

The spelling of 21124222023400 in words is "twenty-one trillion, one hundred twenty-four billion, two hundred twenty-two million, twenty-three thousand, four hundred".