21112021200011 has 4 divisors (see below), whose sum is σ = 24128024228592. Its totient is φ = 18096018171432.

The previous prime is 21112021199989. The next prime is 21112021200031. The reversal of 21112021200011 is 11000212021112.

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

It is a cyclic number.

It is not a de Polignac number, because 21112021200011 - 2⁶ = 21112021199947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112021200031) 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, 1508001514280 + ... + 1508001514293.

It is an arithmetic number, because the mean of its divisors is an integer number (6032006057148).

Almost surely, 2^{21112021200011} is an apocalyptic number.

21112021200011 is a deficient number, since it is larger than the sum of its proper divisors (3016003028581).

21112021200011 is an equidigital number, since it uses as much as digits as its factorization.

21112021200011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3016003028580.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21112021200011 its reverse (11000212021112), we get a palindrome (32112233221123).

The spelling of 21112021200011 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, two hundred thousand, eleven".