21213442312012 has 12 divisors (see below), whose sum is σ = 37593442072480. Its totient is φ = 10472458862736.

The previous prime is 21213442311989. The next prime is 21213442312093. The reversal of 21213442312012 is 21021324431212.

It is a super-2 number, since 2×21213442312012² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33565572963 + ... + 33565573594.

Almost surely, 2^{21213442312012} is an apocalyptic number.

It is an amenable number.

21213442312012 is a deficient number, since it is larger than the sum of its proper divisors (16379999760468).

21213442312012 is a wasteful number, since it uses less digits than its factorization.

21213442312012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67131146640 (or 67131146638 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21213442312012 its reverse (21021324431212), we get a palindrome (42234766743224).

The spelling of 21213442312012 in words is "twenty-one trillion, two hundred thirteen billion, four hundred forty-two million, three hundred twelve thousand, twelve".