21000030212211 has 8 divisors (see below), whose sum is σ = 28090072568064. Its totient is φ = 13955003998920.

The previous prime is 21000030212149. The next prime is 21000030212233. The reversal of 21000030212211 is 11221203000012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21000030212211 - 2³⁴ = 20982850343027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21000030212281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11254034551 + ... + 11254036416.

It is an arithmetic number, because the mean of its divisors is an integer number (3511259071008).

Almost surely, 2^{21000030212211} is an apocalyptic number.

21000030212211 is a deficient number, since it is larger than the sum of its proper divisors (7090042355853).

21000030212211 is a wasteful number, since it uses less digits than its factorization.

21000030212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22508071281.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 21000030212211 its reverse (11221203000012), we get a palindrome (32221233212223).

The spelling of 21000030212211 in words is "twenty-one trillion, thirty million, two hundred twelve thousand, two hundred eleven".