21222211000 has 32 divisors (see below), whose sum is σ = 49659976080. Its totient is φ = 8488884000.

The previous prime is 21222210979. The next prime is 21222211009. The reversal of 21222211000 is 11222212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222211009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10610106 + ... + 10612105.

Almost surely, 2^21222211000 is an apocalyptic number.

21222211000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222211000 is an abundant number, since it is smaller than the sum of its proper divisors (28437765080).

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

21222211000 is a wasteful number, since it uses less digits than its factorization.

21222211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21222232 (or 21222218 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21222211000 its reverse (11222212), we get a palindrome (21233433212).

It can be divided in two parts, 2122 and 2211000, that added together give a palindrome (2213122).

The spelling of 21222211000 in words is "twenty-one billion, two hundred twenty-two million, two hundred eleven thousand".