121002012021181 has 2 divisors, whose sum is σ = 121002012021182. Its totient is φ = 121002012021180.

The previous prime is 121002012021113. The next prime is 121002012021257. The reversal of 121002012021181 is 181120210200121.

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., 99768034676025 + 21233977345156 = 9988395^2 + 4608034^2 .

It is a cyclic number.

It is not a de Polignac number, because 121002012021181 - 2¹⁹ = 121002011496893 is a prime.

It is a super-2 number, since 2×121002012021181² (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 (121002012021281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60501006010590 + 60501006010591.

It is an arithmetic number, because the mean of its divisors is an integer number (60501006010591).

Almost surely, 2^{121002012021181} is an apocalyptic number.

It is an amenable number.

121002012021181 is a deficient number, since it is larger than the sum of its proper divisors (1).

121002012021181 is an equidigital number, since it uses as much as digits as its factorization.

121002012021181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 121002012021181 in words is "one hundred twenty-one trillion, two billion, twelve million, twenty-one thousand, one hundred eighty-one".