21200011332001 has 4 divisors (see below), whose sum is σ = 21490422446212. Its totient is φ = 20909600217792.

The previous prime is 21200011331969. The next prime is 21200011332041. The reversal of 21200011332001 is 10023311000212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8492561640000 + 12707449692001 = 2914200^2 + 3564751^2 .

It is a cyclic number.

It is not a de Polignac number, because 21200011332001 - 2⁵ = 21200011331969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200011332041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145205556996 + ... + 145205557141.

It is an arithmetic number, because the mean of its divisors is an integer number (5372605611553).

Almost surely, 2^{21200011332001} is an apocalyptic number.

It is an amenable number.

21200011332001 is a deficient number, since it is larger than the sum of its proper divisors (290411114211).

21200011332001 is an equidigital number, since it uses as much as digits as its factorization.

21200011332001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290411114210.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21200011332001 its reverse (10023311000212), we get a palindrome (31223322332213).

The spelling of 21200011332001 in words is "twenty-one trillion, two hundred billion, eleven million, three hundred thirty-two thousand, one".