211012111211081 has 2 divisors, whose sum is σ = 211012111211082. Its totient is φ = 211012111211080.

The previous prime is 211012111211021. The next prime is 211012111211089. The reversal of 211012111211081 is 180112111210112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210822268878400 + 189842332681 = 14519720^2 + 435709^2 .

It is a cyclic number.

It is not a de Polignac number, because 211012111211081 - 2⁶ = 211012111211017 is a prime.

It is a super-3 number, since 3×211012111211081³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (211012111211089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105506055605540 + 105506055605541.

It is an arithmetic number, because the mean of its divisors is an integer number (105506055605541).

Almost surely, 2^{211012111211081} is an apocalyptic number.

It is an amenable number.

211012111211081 is a deficient number, since it is larger than the sum of its proper divisors (1).

211012111211081 is an equidigital number, since it uses as much as digits as its factorization.

211012111211081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 23.

Adding to 211012111211081 its reverse (180112111210112), we get a palindrome (391124222421193).

The spelling of 211012111211081 in words is "two hundred eleven trillion, twelve billion, one hundred eleven million, two hundred eleven thousand, eighty-one".