21225203411052 has 24 divisors (see below), whose sum is σ = 49529553486336. Its totient is φ = 7074485109328.

The previous prime is 21225203411039. The next prime is 21225203411053. The reversal of 21225203411052 is 25011430252212.

It is not an unprimeable number, because it can be changed into a prime (21225203411053) 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, 72685008 + ... + 72976439.

It is an arithmetic number, because the mean of its divisors is an integer number (2063731395264).

Almost surely, 2^{21225203411052} is an apocalyptic number.

It is an amenable number.

21225203411052 is an abundant number, since it is smaller than the sum of its proper divisors (28304350075284).

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

21225203411052 is a wasteful number, since it uses less digits than its factorization.

21225203411052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145673597 (or 145673595 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 21225203411052 its reverse (25011430252212), we get a palindrome (46236633663264).

The spelling of 21225203411052 in words is "twenty-one trillion, two hundred twenty-five billion, two hundred three million, four hundred eleven thousand, fifty-two".