20101200001111 has 2 divisors, whose sum is σ = 20101200001112. Its totient is φ = 20101200001110.

The previous prime is 20101200001073. The next prime is 20101200001123. The reversal of 20101200001111 is 11110000210102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20101200001111 - 2⁷ = 20101200000983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20101200071111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10050600000555 + 10050600000556.

It is an arithmetic number, because the mean of its divisors is an integer number (10050600000556).

Almost surely, 2^{20101200001111} is an apocalyptic number.

20101200001111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20101200001111 is an equidigital number, since it uses as much as digits as its factorization.

20101200001111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 20101200001111 its reverse (11110000210102), we get a palindrome (31211200211213).

The spelling of 20101200001111 in words is "twenty trillion, one hundred one billion, two hundred million, one thousand, one hundred eleven".