20211110012011 has 2 divisors, whose sum is σ = 20211110012012. Its totient is φ = 20211110012010.

The previous prime is 20211110011999. The next prime is 20211110012033. The reversal of 20211110012011 is 11021001111202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211110012011 - 2¹¹ = 20211110009963 is a prime.

It is a super-2 number, since 2×20211110012011² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20211110011982 and 20211110012000.

It is not a weakly prime, because it can be changed into another prime (20211110012111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105555006005 + 10105555006006.

It is an arithmetic number, because the mean of its divisors is an integer number (10105555006006).

Almost surely, 2^{20211110012011} is an apocalyptic number.

20211110012011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211110012011 is an equidigital number, since it uses as much as digits as its factorization.

20211110012011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20211110012011 its reverse (11021001111202), we get a palindrome (31232111123213).

The spelling of 20211110012011 in words is "twenty trillion, two hundred eleven billion, one hundred ten million, twelve thousand, eleven".