21222041200 has 30 divisors (see below), whose sum is σ = 50985954944. Its totient is φ = 8488816320.

The previous prime is 21222041149. The next prime is 21222041227. The reversal of 21222041200 is 214022212.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 26527152 + ... + 26527951.

Almost surely, 2^21222041200 is an apocalyptic number.

21222041200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222041200 is an abundant number, since it is smaller than the sum of its proper divisors (29763913744).

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

21222041200 is a wasteful number, since it uses less digits than its factorization.

21222041200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53055121 (or 53055110 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21222041200 its reverse (214022212), we get a palindrome (21436063412).

The spelling of 21222041200 in words is "twenty-one billion, two hundred twenty-two million, forty-one thousand, two hundred".