21222312010432 has 28 divisors (see below), whose sum is σ = 45352488889456. Its totient is φ = 9794913235200.

The previous prime is 21222312010423. The next prime is 21222312010439. The reversal of 21222312010432 is 23401021322212.

It is a junction number, because it is equal to n+sod(n) for n = 21222312010397 and 21222312010406.

It is not an unprimeable number, because it can be changed into a prime (21222312010439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12753792444 + ... + 12753794107.

It is an arithmetic number, because the mean of its divisors is an integer number (1619731746052).

Almost surely, 2^{21222312010432} is an apocalyptic number.

It is an amenable number.

21222312010432 is an abundant number, since it is smaller than the sum of its proper divisors (24130176879024).

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

21222312010432 is a wasteful number, since it uses less digits than its factorization.

21222312010432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25507586576 (or 25507586566 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 21222312010432 its reverse (23401021322212), we get a palindrome (44623333332644).

The spelling of 21222312010432 in words is "twenty-one trillion, two hundred twenty-two billion, three hundred twelve million, ten thousand, four hundred thirty-two".