21213414222 has 128 divisors (see below), whose sum is σ = 57768173568. Its totient is φ = 5014396800.

The previous prime is 21213414217. The next prime is 21213414251. The reversal of 21213414222 is 22241431212.

It is a junction number, because it is equal to n+sod(n) for n = 21213414192 and 21213414201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 401553 + ... + 451299.

It is an arithmetic number, because the mean of its divisors is an integer number (451313856).

Almost surely, 2^21213414222 is an apocalyptic number.

21213414222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21213414222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28884086784).

21213414222 is an abundant number, since it is smaller than the sum of its proper divisors (36554759346).

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

21213414222 is a wasteful number, since it uses less digits than its factorization.

21213414222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49854.

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

Adding to 21213414222 its reverse (22241431212), we get a palindrome (43454845434).

The spelling of 21213414222 in words is "twenty-one billion, two hundred thirteen million, four hundred fourteen thousand, two hundred twenty-two".