21001034212 has 24 divisors (see below), whose sum is σ = 38393099136. Its totient is φ = 10032610368.

The previous prime is 21001034141. The next prime is 21001034213. The reversal of 21001034212 is 21243010012.

It is not an unprimeable number, because it can be changed into a prime (21001034213) by changing a digit.

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, 47073 + ... + 210280.

It is an arithmetic number, because the mean of its divisors is an integer number (1599712464).

Almost surely, 2^21001034212 is an apocalyptic number.

It is an amenable number.

21001034212 is a deficient number, since it is larger than the sum of its proper divisors (17392064924).

21001034212 is a wasteful number, since it uses less digits than its factorization.

21001034212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258267 (or 258265 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21001034212 its reverse (21243010012), we get a palindrome (42244044224).

The spelling of 21001034212 in words is "twenty-one billion, one million, thirty-four thousand, two hundred twelve".