21224003111400 has 48 divisors (see below), whose sum is σ = 65794409647200. Its totient is φ = 5659734162880.

The previous prime is 21224003111383. The next prime is 21224003111413. The reversal of 21224003111400 is 411130042212.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17686668660 + ... + 17686669859.

It is an arithmetic number, because the mean of its divisors is an integer number (1370716867650).

Almost surely, 2^{21224003111400} is an apocalyptic number.

21224003111400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21224003111400 is an abundant number, since it is smaller than the sum of its proper divisors (44570406535800).

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

21224003111400 is a wasteful number, since it uses less digits than its factorization.

21224003111400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35373338538 (or 35373338529 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 21224003111400 its reverse (411130042212), we get a palindrome (21635133153612).

The spelling of 21224003111400 in words is "twenty-one trillion, two hundred twenty-four billion, three million, one hundred eleven thousand, four hundred".