121102222181 has 2 divisors, whose sum is σ = 121102222182. Its totient is φ = 121102222180.

The previous prime is 121102222177. The next prime is 121102222237. The reversal of 121102222181 is 181222201121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98313602500 + 22788619681 = 313550^2 + 150959^2 .

It is a cyclic number.

It is not a de Polignac number, because 121102222181 - 2² = 121102222177 is a prime.

It is a super-2 number, since 2×121102222181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121102221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60551111090 + 60551111091.

It is an arithmetic number, because the mean of its divisors is an integer number (60551111091).

Almost surely, 2^121102222181 is an apocalyptic number.

It is an amenable number.

121102222181 is a deficient number, since it is larger than the sum of its proper divisors (1).

121102222181 is an equidigital number, since it uses as much as digits as its factorization.

121102222181 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 23.

The spelling of 121102222181 in words is "one hundred twenty-one billion, one hundred two million, two hundred twenty-two thousand, one hundred eighty-one".