21220340132 has 48 divisors (see below), whose sum is σ = 39234585600. Its totient is φ = 10022284800.

The previous prime is 21220340101. The next prime is 21220340137. The reversal of 21220340132 is 23104302212.

It is not an unprimeable number, because it can be changed into a prime (21220340137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11781632 + ... + 11783432.

It is an arithmetic number, because the mean of its divisors is an integer number (817387200).

Almost surely, 2^21220340132 is an apocalyptic number.

It is an amenable number.

21220340132 is a deficient number, since it is larger than the sum of its proper divisors (18014245468).

21220340132 is a wasteful number, since it uses less digits than its factorization.

21220340132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3356 (or 3354 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21220340132 its reverse (23104302212), we get a palindrome (44324642344).

The spelling of 21220340132 in words is "twenty-one billion, two hundred twenty million, three hundred forty thousand, one hundred thirty-two".