121310331173 has 2 divisors, whose sum is σ = 121310331174. Its totient is φ = 121310331172.

The previous prime is 121310331101. The next prime is 121310331193. The reversal of 121310331173 is 371133013121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79308697924 + 42001633249 = 281618^2 + 204943^2 .

It is a cyclic number.

It is not a de Polignac number, because 121310331173 - 2¹⁰ = 121310330149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121310331193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655165586 + 60655165587.

It is an arithmetic number, because the mean of its divisors is an integer number (60655165587).

Almost surely, 2^121310331173 is an apocalyptic number.

It is an amenable number.

121310331173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121310331173 is an equidigital number, since it uses as much as digits as its factorization.

121310331173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 26.

Adding to 121310331173 its reverse (371133013121), we get a palindrome (492443344294).

The spelling of 121310331173 in words is "one hundred twenty-one billion, three hundred ten million, three hundred thirty-one thousand, one hundred seventy-three".