21221412225432 has 64 divisors (see below), whose sum is σ = 53760657484800. Its totient is φ = 6979639031040.

The previous prime is 21221412225427. The next prime is 21221412225443. The reversal of 21221412225432 is 23452221412212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21221412225393 and 21221412225402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 838893 + ... + 6568604.

It is an arithmetic number, because the mean of its divisors is an integer number (840010273200).

Almost surely, 2^{21221412225432} is an apocalyptic number.

It is an amenable number.

21221412225432 is an abundant number, since it is smaller than the sum of its proper divisors (32539245259368).

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

21221412225432 is a wasteful number, since it uses less digits than its factorization.

21221412225432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7409096 (or 7409092 counting only the distinct ones).

The product of its digits is 30720, while the sum is 33.

Adding to 21221412225432 its reverse (23452221412212), we get a palindrome (44673633637644).

The spelling of 21221412225432 in words is "twenty-one trillion, two hundred twenty-one billion, four hundred twelve million, two hundred twenty-five thousand, four hundred thirty-two".