2111311981211 has 2 divisors, whose sum is σ = 2111311981212. Its totient is φ = 2111311981210.

The previous prime is 2111311981187. The next prime is 2111311981253. The reversal of 2111311981211 is 1121891131112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2111311981211 - 2¹⁸ = 2111311719067 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111311981271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055655990605 + 1055655990606.

It is an arithmetic number, because the mean of its divisors is an integer number (1055655990606).

Almost surely, 2^{2111311981211} is an apocalyptic number.

2111311981211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111311981211 is an equidigital number, since it uses as much as digits as its factorization.

2111311981211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 32.

The spelling of 2111311981211 in words is "two trillion, one hundred eleven billion, three hundred eleven million, nine hundred eighty-one thousand, two hundred eleven".