21334131224 has 32 divisors (see below), whose sum is σ = 46831024800. Its totient is φ = 8920193280.

The previous prime is 21334131199. The next prime is 21334131227. The reversal of 21334131224 is 42213143312.

It is a junction number, because it is equal to n+sod(n) for n = 21334131193 and 21334131202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21334131227) 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, 4643639 + ... + 4648230.

It is an arithmetic number, because the mean of its divisors is an integer number (1463469525).

Almost surely, 2^21334131224 is an apocalyptic number.

It is an amenable number.

21334131224 is an abundant number, since it is smaller than the sum of its proper divisors (25496893576).

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

21334131224 is a wasteful number, since it uses less digits than its factorization.

21334131224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9291923 (or 9291919 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

Adding to 21334131224 its reverse (42213143312), we get a palindrome (63547274536).

The spelling of 21334131224 in words is "twenty-one billion, three hundred thirty-four million, one hundred thirty-one thousand, two hundred twenty-four".