100212222111181 has 2 divisors, whose sum is σ = 100212222111182. Its totient is φ = 100212222111180.

The previous prime is 100212222111163. The next prime is 100212222111227. The reversal of 100212222111181 is 181111222212001.

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., 69737781337225 + 30474440773956 = 8350915^2 + 5520366^2 .

It is a cyclic number.

It is not a de Polignac number, because 100212222111181 - 2²¹ = 100212220014029 is a prime.

It is a super-2 number, since 2×100212222111181² (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 (100212222171181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50106111055590 + 50106111055591.

It is an arithmetic number, because the mean of its divisors is an integer number (50106111055591).

Almost surely, 2^{100212222111181} is an apocalyptic number.

It is an amenable number.

100212222111181 is a deficient number, since it is larger than the sum of its proper divisors (1).

100212222111181 is an equidigital number, since it uses as much as digits as its factorization.

100212222111181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 25.

Adding to 100212222111181 its reverse (181111222212001), we get a palindrome (281323444323182).

The spelling of 100212222111181 in words is "one hundred trillion, two hundred twelve billion, two hundred twenty-two million, one hundred eleven thousand, one hundred eighty-one".