121120331173 has 2 divisors, whose sum is σ = 121120331174. Its totient is φ = 121120331172.

The previous prime is 121120331083. The next prime is 121120331177. The reversal of 121120331173 is 371133021121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120424268484 + 696062689 = 347022^2 + 26383^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121120331173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121120331177) 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, 60560165586 + 60560165587.

It is an arithmetic number, because the mean of its divisors is an integer number (60560165587).

Almost surely, 2^121120331173 is an apocalyptic number.

It is an amenable number.

121120331173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121120331173 is an equidigital number, since it uses as much as digits as its factorization.

121120331173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 25.

Adding to 121120331173 its reverse (371133021121), we get a palindrome (492253352294).

The spelling of 121120331173 in words is "one hundred twenty-one billion, one hundred twenty million, three hundred thirty-one thousand, one hundred seventy-three".