21112210202011 has 4 divisors (see below), whose sum is σ = 21178810234512. Its totient is φ = 21045610169512.

The previous prime is 21112210201997. The next prime is 21112210202023. The reversal of 21112210202011 is 11020201221112.

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 21112210202011 - 2⁷ = 21112210201883 is a prime.

It is a super-2 number, since 2×21112210202011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21112210202911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33300015775 + ... + 33300016408.

It is an arithmetic number, because the mean of its divisors is an integer number (5294702558628).

Almost surely, 2^{21112210202011} is an apocalyptic number.

21112210202011 is a deficient number, since it is larger than the sum of its proper divisors (66600032501).

21112210202011 is an equidigital number, since it uses as much as digits as its factorization.

21112210202011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66600032500.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112210202011 its reverse (11020201221112), we get a palindrome (32132411423123).

The spelling of 21112210202011 in words is "twenty-one trillion, one hundred twelve billion, two hundred ten million, two hundred two thousand, eleven".