201220100201111 has 2 divisors, whose sum is σ = 201220100201112. Its totient is φ = 201220100201110.

The previous prime is 201220100201093. The next prime is 201220100201117. The reversal of 201220100201111 is 111102001022102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201220100201111 is a prime.

It is a super-2 number, since 2×201220100201111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201220100201117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610050100555 + 100610050100556.

It is an arithmetic number, because the mean of its divisors is an integer number (100610050100556).

Almost surely, 2^{201220100201111} is an apocalyptic number.

201220100201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220100201111 is an equidigital number, since it uses as much as digits as its factorization.

201220100201111 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 14.

Adding to 201220100201111 its reverse (111102001022102), we get a palindrome (312322101223213).

The spelling of 201220100201111 in words is "two hundred one trillion, two hundred twenty billion, one hundred million, two hundred one thousand, one hundred eleven".