21412124012 has 24 divisors (see below), whose sum is σ = 37976450736. Its totient is φ = 10562669568.

The previous prime is 21412124009. The next prime is 21412124023. The reversal of 21412124012 is 21042121412.

It is a super-2 number, since 2×21412124012² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30533 + ... + 209180.

It is an arithmetic number, because the mean of its divisors is an integer number (1582352114).

Almost surely, 2^21412124012 is an apocalyptic number.

It is an amenable number.

21412124012 is a deficient number, since it is larger than the sum of its proper divisors (16564326724).

21412124012 is a wasteful number, since it uses less digits than its factorization.

21412124012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240017 (or 240015 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21412124012 its reverse (21042121412), we get a palindrome (42454245424).

The spelling of 21412124012 in words is "twenty-one billion, four hundred twelve million, one hundred twenty-four thousand, twelve".