121020102112181 has 2 divisors, whose sum is σ = 121020102112182. Its totient is φ = 121020102112180.

The previous prime is 121020102112177. The next prime is 121020102112201. The reversal of 121020102112181 is 181211201020121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109662595504081 + 11357506608100 = 10471991^2 + 3370090^2 .

It is a cyclic number.

It is not a de Polignac number, because 121020102112181 - 2² = 121020102112177 is a prime.

It is a super-2 number, since 2×121020102112181² (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 (121020102112141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510051056090 + 60510051056091.

It is an arithmetic number, because the mean of its divisors is an integer number (60510051056091).

Almost surely, 2^{121020102112181} is an apocalyptic number.

It is an amenable number.

121020102112181 is a deficient number, since it is larger than the sum of its proper divisors (1).

121020102112181 is an equidigital number, since it uses as much as digits as its factorization.

121020102112181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 23.

The spelling of 121020102112181 in words is "one hundred twenty-one trillion, twenty billion, one hundred two million, one hundred twelve thousand, one hundred eighty-one".