21100320212000 has 96 divisors (see below), whose sum is σ = 52112107769904. Its totient is φ = 8396396544000.

The previous prime is 21100320211991. The next prime is 21100320212009. The reversal of 21100320212000 is 21202300112.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21100320211991) and next prime (21100320212009).

It can be written as a sum of positive squares in 8 ways, for example, as 392833111696 + 20707487100304 = 626764^2 + 4550548^2 .

It is not an unprimeable number, because it can be changed into a prime (21100320212009) 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, 12894011 + ... + 14438010.

Almost surely, 2^{21100320212000} is an apocalyptic number.

21100320212000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21100320212000 is an abundant number, since it is smaller than the sum of its proper divisors (31011787557904).

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

21100320212000 is a wasteful number, since it uses less digits than its factorization.

21100320212000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27332239 (or 27332221 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21100320212000 its reverse (21202300112), we get a palindrome (21121522512112).

The spelling of 21100320212000 in words is "twenty-one trillion, one hundred billion, three hundred twenty million, two hundred twelve thousand".