20211201221011 has 2 divisors, whose sum is σ = 20211201221012. Its totient is φ = 20211201221010.

The previous prime is 20211201220993. The next prime is 20211201221077. The reversal of 20211201221011 is 11012210211202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211201221011 - 2²¹ = 20211199123859 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211201521011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105600610505 + 10105600610506.

It is an arithmetic number, because the mean of its divisors is an integer number (10105600610506).

Almost surely, 2^{20211201221011} is an apocalyptic number.

20211201221011 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211201221011 is an equidigital number, since it uses as much as digits as its factorization.

20211201221011 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20211201221011 its reverse (11012210211202), we get a palindrome (31223411432213).

The spelling of 20211201221011 in words is "twenty trillion, two hundred eleven billion, two hundred one million, two hundred twenty-one thousand, eleven".