2111402440181 has 2 divisors, whose sum is σ = 2111402440182. Its totient is φ = 2111402440180.

The previous prime is 2111402440159. The next prime is 2111402440267. The reversal of 2111402440181 is 1810442041112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2094868337956 + 16534102225 = 1447366^2 + 128585^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111402440181 - 2³⁴ = 2094222570997 is a prime.

It is a super-2 number, since 2×2111402440181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111402449181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055701220090 + 1055701220091.

It is an arithmetic number, because the mean of its divisors is an integer number (1055701220091).

Almost surely, 2^{2111402440181} is an apocalyptic number.

It is an amenable number.

2111402440181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111402440181 is an equidigital number, since it uses as much as digits as its factorization.

2111402440181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2048, while the sum is 29.

Adding to 2111402440181 its reverse (1810442041112), we get a palindrome (3921844481293).

The spelling of 2111402440181 in words is "two trillion, one hundred eleven billion, four hundred two million, four hundred forty thousand, one hundred eighty-one".