21001000229 has 16 divisors (see below), whose sum is σ = 23156964096. Its totient is φ = 18886348800.

The previous prime is 21001000213. The next prime is 21001000253. The reversal of 21001000229 is 92200010012.

It is not a de Polignac number, because 21001000229 - 2⁴ = 21001000213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001000259) 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 15 ways as a sum of consecutive naturals, for example, 3974069 + ... + 3979349.

It is an arithmetic number, because the mean of its divisors is an integer number (1447310256).

Almost surely, 2^21001000229 is an apocalyptic number.

It is an amenable number.

21001000229 is a deficient number, since it is larger than the sum of its proper divisors (2155963867).

21001000229 is a wasteful number, since it uses less digits than its factorization.

21001000229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9116.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 21001000229 in words is "twenty-one billion, one million, two hundred twenty-nine", and thus it is an aban number.