21200001122011 has 8 divisors (see below), whose sum is σ = 21377158837760. Its totient is φ = 21023003227968.

The previous prime is 21200001121997. The next prime is 21200001122023. The reversal of 21200001122011 is 11022110000212.

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

It is a cyclic number.

It is not a de Polignac number, because 21200001122011 - 2¹⁷ = 21200000990939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21200001121982 and 21200001122000.

It is not an unprimeable number, because it can be changed into a prime (21200001222011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39689016 + ... + 40219621.

It is an arithmetic number, because the mean of its divisors is an integer number (2672144854720).

Almost surely, 2^{21200001122011} is an apocalyptic number.

21200001122011 is a deficient number, since it is larger than the sum of its proper divisors (177157715749).

21200001122011 is a wasteful number, since it uses less digits than its factorization.

21200001122011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79910853.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21200001122011 its reverse (11022110000212), we get a palindrome (32222111122223).

The spelling of 21200001122011 in words is "twenty-one trillion, two hundred billion, one million, one hundred twenty-two thousand, eleven".