21000011000212 has 12 divisors (see below), whose sum is σ = 36758198676276. Its totient is φ = 10497668521280.

The previous prime is 21000011000203. The next prime is 21000011000219. The reversal of 21000011000212 is 21200011000012.

It can be written as a sum of positive squares in 2 ways, for example, as 20960611132176 + 39399868036 = 4578276^2 + 198494^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000011000219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584224489 + ... + 584260432.

It is an arithmetic number, because the mean of its divisors is an integer number (3063183223023).

Almost surely, 2^{21000011000212} is an apocalyptic number.

It is an amenable number.

21000011000212 is a deficient number, since it is larger than the sum of its proper divisors (15758187676064).

21000011000212 is a wasteful number, since it uses less digits than its factorization.

21000011000212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1168489418 (or 1168489416 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21000011000212 its reverse (21200011000012), we get a palindrome (42200022000224).

The spelling of 21000011000212 in words is "twenty-one trillion, eleven million, two hundred twelve", and thus it is an aban number.