2211001081 has 2 divisors, whose sum is σ = 2211001082. Its totient is φ = 2211001080.

The previous prime is 2211001057. The next prime is 2211001097. The reversal of 2211001081 is 1801001122.

2211001081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (2211001097) can be obtained adding 2211001081 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2066520681 + 144480400 = 45459^2 + 12020^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211001081 - 2¹¹ = 2210999033 is a prime.

It is a super-2 number, since 2×2211001081² = 9777051560366337122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2211001031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105500540 + 1105500541.

It is an arithmetic number, because the mean of its divisors is an integer number (1105500541).

Almost surely, 2^2211001081 is an apocalyptic number.

It is an amenable number.

2211001081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211001081 is an equidigital number, since it uses as much as digits as its factorization.

2211001081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 2211001081 is about 47021.2832768311. The cubic root of 2211001081 is about 1302.7557088248.

The spelling of 2211001081 in words is "two billion, two hundred eleven million, one thousand, eighty-one".