21122120110011 has 8 divisors (see below), whose sum is σ = 28162861919760. Its totient is φ = 14081395853472.

The previous prime is 21122120109947. The next prime is 21122120110043. The reversal of 21122120110011 is 11001102122112.

It is a happy number.

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

It is not a de Polignac number, because 21122120110011 - 2⁶ = 21122120109947 is a prime.

It is a super-2 number, since 2×21122120110011² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21122120111011) 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, 1262476 + ... + 6621033.

It is an arithmetic number, because the mean of its divisors is an integer number (3520357739970).

Almost surely, 2^{21122120110011} is an apocalyptic number.

21122120110011 is a deficient number, since it is larger than the sum of its proper divisors (7040741809749).

21122120110011 is an equidigital number, since it uses as much as digits as its factorization.

21122120110011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8776605.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21122120110011 its reverse (11001102122112), we get a palindrome (32123222232123).

The spelling of 21122120110011 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred twenty million, one hundred ten thousand, eleven".