21214421322 has 16 divisors (see below), whose sum is σ = 42539627520. Its totient is φ = 7053009632.

The previous prime is 21214421311. The next prime is 21214421323. The reversal of 21214421322 is 22312441212.

It is a junction number, because it is equal to n+sod(n) for n = 21214421292 and 21214421301.

It is not an unprimeable number, because it can be changed into a prime (21214421323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4613547 + ... + 4618142.

It is an arithmetic number, because the mean of its divisors is an integer number (2658726720).

Almost surely, 2^21214421322 is an apocalyptic number.

21214421322 is an abundant number, since it is smaller than the sum of its proper divisors (21325206198).

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

21214421322 is a wasteful number, since it uses less digits than its factorization.

21214421322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9232077.

The product of its digits is 1536, while the sum is 24.

Adding to 21214421322 its reverse (22312441212), we get a palindrome (43526862534).

The spelling of 21214421322 in words is "twenty-one billion, two hundred fourteen million, four hundred twenty-one thousand, three hundred twenty-two".