21431202212 has 24 divisors (see below), whose sum is σ = 42867088320. Its totient is φ = 9183797280.

The previous prime is 21431202203. The next prime is 21431202251. The reversal of 21431202212 is 21220213412.

It is a super-3 number, since 3×21431202212³ (a number of 32 digits) contains 333 as substring.

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, 256262 + ... + 329442.

It is an arithmetic number, because the mean of its divisors is an integer number (1786128680).

Almost surely, 2^21431202212 is an apocalyptic number.

It is an amenable number.

21431202212 is an abundant number, since it is smaller than the sum of its proper divisors (21435886108).

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

21431202212 is a wasteful number, since it uses less digits than its factorization.

21431202212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83651 (or 83649 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21431202212 its reverse (21220213412), we get a palindrome (42651415624).

The spelling of 21431202212 in words is "twenty-one billion, four hundred thirty-one million, two hundred two thousand, two hundred twelve".