21100220120011 has 2 divisors, whose sum is σ = 21100220120012. Its totient is φ = 21100220120010.

The previous prime is 21100220120003. The next prime is 21100220120017. The reversal of 21100220120011 is 11002102200112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100220120011 - 2³ = 21100220120003 is a prime.

It is a super-2 number, since 2×21100220120011² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21100220119973 and 21100220120000.

It is not a weakly prime, because it can be changed into another prime (21100220120017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550110060005 + 10550110060006.

It is an arithmetic number, because the mean of its divisors is an integer number (10550110060006).

Almost surely, 2^{21100220120011} is an apocalyptic number.

21100220120011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100220120011 is an equidigital number, since it uses as much as digits as its factorization.

21100220120011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21100220120011 its reverse (11002102200112), we get a palindrome (32102322320123).

The spelling of 21100220120011 in words is "twenty-one trillion, one hundred billion, two hundred twenty million, one hundred twenty thousand, eleven".