210020200111181 has 2 divisors, whose sum is σ = 210020200111182. Its totient is φ = 210020200111180.

The previous prime is 210020200111079. The next prime is 210020200111229. The reversal of 210020200111181 is 181111002020012.

It is a happy number.

210020200111181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 207690150508681 + 2330049602500 = 14411459^2 + 1526450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210020200111181 is a prime.

It is a super-2 number, since 2×210020200111181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210020200111681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010100055590 + 105010100055591.

It is an arithmetic number, because the mean of its divisors is an integer number (105010100055591).

Almost surely, 2^{210020200111181} is an apocalyptic number.

It is an amenable number.

210020200111181 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020200111181 is an equidigital number, since it uses as much as digits as its factorization.

210020200111181 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 20.

Adding to 210020200111181 its reverse (181111002020012), we get a palindrome (391131202131193).

The spelling of 210020200111181 in words is "two hundred ten trillion, twenty billion, two hundred million, one hundred eleven thousand, one hundred eighty-one".