21223101400 has 24 divisors (see below), whose sum is σ = 49343711220. Its totient is φ = 8489240480.

The previous prime is 21223101343. The next prime is 21223101467. The reversal of 21223101400 is 410132212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53057554 + ... + 53057953.

Almost surely, 2^21223101400 is an apocalyptic number.

21223101400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21223101400 is an abundant number, since it is smaller than the sum of its proper divisors (28120609820).

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

21223101400 is a wasteful number, since it uses less digits than its factorization.

21223101400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106115523 (or 106115514 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21223101400 its reverse (410132212), we get a palindrome (21633233612).

The spelling of 21223101400 in words is "twenty-one billion, two hundred twenty-three million, one hundred one thousand, four hundred".