21224114452 has 6 divisors (see below), whose sum is σ = 37142200298. Its totient is φ = 10612057224.

The previous prime is 21224114413. The next prime is 21224114453. The reversal of 21224114452 is 25441142212.

It can be written as a sum of positive squares in only one way, i.e., 17783822736 + 3440291716 = 133356^2 + 58654^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21224114452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224114453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2653014303 + ... + 2653014310.

Almost surely, 2^21224114452 is an apocalyptic number.

It is an amenable number.

21224114452 is a deficient number, since it is larger than the sum of its proper divisors (15918085846).

21224114452 is a wasteful number, since it uses less digits than its factorization.

21224114452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306028617 (or 5306028615 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

Adding to 21224114452 its reverse (25441142212), we get a palindrome (46665256664).

The spelling of 21224114452 in words is "twenty-one billion, two hundred twenty-four million, one hundred fourteen thousand, four hundred fifty-two".