21201003012 has 24 divisors (see below), whose sum is σ = 56536008256. Its totient is φ = 6057429408.

The previous prime is 21201002987. The next prime is 21201003023. The reversal of 21201003012 is 21030010212.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 126196363 + ... + 126196530.

Almost surely, 2^21201003012 is an apocalyptic number.

It is an amenable number.

21201003012 is an abundant number, since it is smaller than the sum of its proper divisors (35335005244).

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

21201003012 is a wasteful number, since it uses less digits than its factorization.

21201003012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252392907 (or 252392905 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21201003012 its reverse (21030010212), we get a palindrome (42231013224).

The spelling of 21201003012 in words is "twenty-one billion, two hundred one million, three thousand, twelve".