21302323212 has 24 divisors (see below), whose sum is σ = 52629269616. Its totient is φ = 6683081728.

The previous prime is 21302323187. The next prime is 21302323243. The reversal of 21302323212 is 21232320312.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52211373 + ... + 52211780.

It is an arithmetic number, because the mean of its divisors is an integer number (2192886234).

Almost surely, 2^21302323212 is an apocalyptic number.

It is an amenable number.

21302323212 is an abundant number, since it is smaller than the sum of its proper divisors (31326946404).

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

21302323212 is a wasteful number, since it uses less digits than its factorization.

21302323212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104423177 (or 104423175 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21302323212 its reverse (21232320312), we get a palindrome (42534643524).

The spelling of 21302323212 in words is "twenty-one billion, three hundred two million, three hundred twenty-three thousand, two hundred twelve".