21322101222 has 48 divisors (see below), whose sum is σ = 47554238160. Its totient is φ = 6899570496.

The previous prime is 21322101197. The next prime is 21322101253. The reversal of 21322101222 is 22210122312.

21322101222 is a `hidden beast` number, since 21 + 322 + 101 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21322101195 and 21322101204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258904 + ... + 331172.

It is an arithmetic number, because the mean of its divisors is an integer number (990713295).

Almost surely, 2^21322101222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21322101222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23777119080).

21322101222 is an abundant number, since it is smaller than the sum of its proper divisors (26232136938).

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

21322101222 is a wasteful number, since it uses less digits than its factorization.

21322101222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72757 (or 72754 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21322101222 its reverse (22210122312), we get a palindrome (43532223534).

The spelling of 21322101222 in words is "twenty-one billion, three hundred twenty-two million, one hundred one thousand, two hundred twenty-two".