21331422224 has 40 divisors (see below), whose sum is σ = 47651890560. Its totient is φ = 9061129728.

The previous prime is 21331422187. The next prime is 21331422253. The reversal of 21331422224 is 42222413312.

It is a super-2 number, since 2×21331422224² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21331422193 and 21331422202.

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, 830084 + ... + 855395.

It is an arithmetic number, because the mean of its divisors is an integer number (1191297264).

Almost surely, 2^21331422224 is an apocalyptic number.

It is an amenable number.

21331422224 is an abundant number, since it is smaller than the sum of its proper divisors (26320468336).

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

21331422224 is a wasteful number, since it uses less digits than its factorization.

21331422224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685607 (or 1685601 counting only the distinct ones).

The product of its digits is 4608, while the sum is 26.

Adding to 21331422224 its reverse (42222413312), we get a palindrome (63553835536).

The spelling of 21331422224 in words is "twenty-one billion, three hundred thirty-one million, four hundred twenty-two thousand, two hundred twenty-four".