21221414214 has 96 divisors (see below), whose sum is σ = 58003900416. Its totient is φ = 5088041280.

The previous prime is 21221414213. The next prime is 21221414231. The reversal of 21221414214 is 41241412212.

It is a happy number.

It is a super-2 number, since 2×21221414214² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221414213) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 210342 + ... + 294425.

It is an arithmetic number, because the mean of its divisors is an integer number (604207296).

Almost surely, 2^21221414214 is an apocalyptic number.

21221414214 is an abundant number, since it is smaller than the sum of its proper divisors (36782486202).

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

21221414214 is a wasteful number, since it uses less digits than its factorization.

21221414214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504810 (or 504803 counting only the distinct ones).

The product of its digits is 1024, while the sum is 24.

Adding to 21221414214 its reverse (41241412212), we get a palindrome (62462826426).

The spelling of 21221414214 in words is "twenty-one billion, two hundred twenty-one million, four hundred fourteen thousand, two hundred fourteen".