2211021102181 has 2 divisors, whose sum is σ = 2211021102182. Its totient is φ = 2211021102180.

The previous prime is 2211021102163. The next prime is 2211021102221. The reversal of 2211021102181 is 1812011201122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2182075524225 + 28945577956 = 1477185^2 + 170134^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211021102181 - 2²³ = 2211012713573 is a prime.

It is a super-4 number, since 4×2211021102181⁴ (a number of 50 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211021402181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1105510551090 + 1105510551091.

It is an arithmetic number, because the mean of its divisors is an integer number (1105510551091).

Almost surely, 2^{2211021102181} is an apocalyptic number.

It is an amenable number.

2211021102181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211021102181 is an equidigital number, since it uses as much as digits as its factorization.

2211021102181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 2211021102181 in words is "two trillion, two hundred eleven billion, twenty-one million, one hundred two thousand, one hundred eighty-one".