21320002212 has 24 divisors (see below), whose sum is σ = 51091177536. Its totient is φ = 6914595168.

The previous prime is 21320002177. The next prime is 21320002219. The reversal of 21320002212 is 21220002312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21320002191 and 21320002200.

It is not an unprimeable number, because it can be changed into a prime (21320002219) 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, 24008568 + ... + 24009455.

It is an arithmetic number, because the mean of its divisors is an integer number (2128799064).

Almost surely, 2^21320002212 is an apocalyptic number.

It is an amenable number.

21320002212 is an abundant number, since it is smaller than the sum of its proper divisors (29771175324).

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

21320002212 is a wasteful number, since it uses less digits than its factorization.

21320002212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48018067 (or 48018065 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21320002212 its reverse (21220002312), we get a palindrome (42540004524).

The spelling of 21320002212 in words is "twenty-one billion, three hundred twenty million, two thousand, two hundred twelve".