20211200201111 has 2 divisors, whose sum is σ = 20211200201112. Its totient is φ = 20211200201110.

The previous prime is 20211200201083. The next prime is 20211200201173. The reversal of 20211200201111 is 11110200211202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20211200201111 - 2⁶ = 20211200201047 is a prime.

It is a super-2 number, since 2×20211200201111² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20211200201011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105600100555 + 10105600100556.

It is an arithmetic number, because the mean of its divisors is an integer number (10105600100556).

Almost surely, 2^{20211200201111} is an apocalyptic number.

20211200201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211200201111 is an equidigital number, since it uses as much as digits as its factorization.

20211200201111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20211200201111 its reverse (11110200211202), we get a palindrome (31321400412313).

The spelling of 20211200201111 in words is "twenty trillion, two hundred eleven billion, two hundred million, two hundred one thousand, one hundred eleven".