21311113212222 has 16 divisors (see below), whose sum is σ = 42622276973952. Its totient is φ = 7103695979160.

The previous prime is 21311113212209. The next prime is 21311113212251. The reversal of 21311113212222 is 22221231111312.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 21311113212192 and 21311113212201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5471673 + ... + 8518299.

It is an arithmetic number, because the mean of its divisors is an integer number (2663892310872).

Almost surely, 2^{21311113212222} is an apocalyptic number.

21311113212222 is an abundant number, since it is smaller than the sum of its proper divisors (21311163761730).

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

21311113212222 is a wasteful number, since it uses less digits than its factorization.

21311113212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212463.

The product of its digits is 576, while the sum is 24.

Adding to 21311113212222 its reverse (22221231111312), we get a palindrome (43532344323534).

The spelling of 21311113212222 in words is "twenty-one trillion, three hundred eleven billion, one hundred thirteen million, two hundred twelve thousand, two hundred twenty-two".