21200001121011 has 8 divisors (see below), whose sum is σ = 28266983178640. Its totient is φ = 14133176572032.

The previous prime is 21200001121009. The next prime is 21200001121081. The reversal of 21200001121011 is 11012110000212.

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

It is not a de Polignac number, because 21200001121011 - 2¹ = 21200001121009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21200001121001) 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 7 ways as a sum of consecutive naturals, for example, 39062746 + ... + 39601743.

It is an arithmetic number, because the mean of its divisors is an integer number (3533372897330).

Almost surely, 2^{21200001121011} is an apocalyptic number.

21200001121011 is a deficient number, since it is larger than the sum of its proper divisors (7066982057629).

21200001121011 is an equidigital number, since it uses as much as digits as its factorization.

21200001121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78754325.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21200001121011 its reverse (11012110000212), we get a palindrome (32212111121223).

The spelling of 21200001121011 in words is "twenty-one trillion, two hundred billion, one million, one hundred twenty-one thousand, eleven".