3811274220181 has 2 divisors, whose sum is σ = 3811274220182. Its totient is φ = 3811274220180.

The previous prime is 3811274220167. The next prime is 3811274220211. The reversal of 3811274220181 is 1810224721183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3662381650225 + 148892569956 = 1913735^2 + 385866^2 .

It is a cyclic number.

It is not a de Polignac number, because 3811274220181 - 2¹¹ = 3811274218133 is a prime.

It is a super-2 number, since 2×3811274220181² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3811274220161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1905637110090 + 1905637110091.

It is an arithmetic number, because the mean of its divisors is an integer number (1905637110091).

Almost surely, 2^{3811274220181} is an apocalyptic number.

It is an amenable number.

3811274220181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3811274220181 is an equidigital number, since it uses as much as digits as its factorization.

3811274220181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 40.

The spelling of 3811274220181 in words is "three trillion, eight hundred eleven billion, two hundred seventy-four million, two hundred twenty thousand, one hundred eighty-one".