21038284012 has 12 divisors (see below), whose sum is σ = 36825891256. Its totient is φ = 10516600800.

The previous prime is 21038284009. The next prime is 21038284031. The reversal of 21038284012 is 21048283012.

It is a happy number.

It is a super-2 number, since 2×21038284012² (a number of 21 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, 616614 + ... + 649837.

Almost surely, 2^21038284012 is an apocalyptic number.

It is an amenable number.

21038284012 is a deficient number, since it is larger than the sum of its proper divisors (15787607244).

21038284012 is a wasteful number, since it uses less digits than its factorization.

21038284012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270608 (or 1270606 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The spelling of 21038284012 in words is "twenty-one billion, thirty-eight million, two hundred eighty-four thousand, twelve".