121040121161 has 2 divisors, whose sum is σ = 121040121162. Its totient is φ = 121040121160.

The previous prime is 121040121119. The next prime is 121040121173. The reversal of 121040121161 is 161121040121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76695763600 + 44344357561 = 276940^2 + 210581^2 .

It is an emirp because it is prime and its reverse (161121040121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121040121161 - 2¹⁴ = 121040104777 is a prime.

It is not a weakly prime, because it can be changed into another prime (121040121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60520060580 + 60520060581.

It is an arithmetic number, because the mean of its divisors is an integer number (60520060581).

Almost surely, 2^121040121161 is an apocalyptic number.

It is an amenable number.

121040121161 is a deficient number, since it is larger than the sum of its proper divisors (1).

121040121161 is an equidigital number, since it uses as much as digits as its factorization.

121040121161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 121040121161 its reverse (161121040121), we get a palindrome (282161161282).

The spelling of 121040121161 in words is "one hundred twenty-one billion, forty million, one hundred twenty-one thousand, one hundred sixty-one".