2100011212111 has 2 divisors, whose sum is σ = 2100011212112. Its totient is φ = 2100011212110.

The previous prime is 2100011212073. The next prime is 2100011212181. The reversal of 2100011212111 is 1112121100012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100011212111 - 2⁷ = 2100011211983 is a prime.

It is a super-2 number, since 2×2100011212111² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2100011212091 and 2100011212100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100011212181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050005606055 + 1050005606056.

It is an arithmetic number, because the mean of its divisors is an integer number (1050005606056).

Almost surely, 2^{2100011212111} is an apocalyptic number.

2100011212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100011212111 is an equidigital number, since it uses as much as digits as its factorization.

2100011212111 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 2100011212111 its reverse (1112121100012), we get a palindrome (3212132312123).

The spelling of 2100011212111 in words is "two trillion, one hundred billion, eleven million, two hundred twelve thousand, one hundred eleven".