121121022173 has 2 divisors, whose sum is σ = 121121022174. Its totient is φ = 121121022172.

The previous prime is 121121022161. The next prime is 121121022233. The reversal of 121121022173 is 371220121121.

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., 68035940569 + 53085081604 = 260837^2 + 230402^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121022173 - 2¹⁰ = 121121021149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121121024173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560511086 + 60560511087.

It is an arithmetic number, because the mean of its divisors is an integer number (60560511087).

Almost surely, 2^121121022173 is an apocalyptic number.

It is an amenable number.

121121022173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121022173 is an equidigital number, since it uses as much as digits as its factorization.

121121022173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 121121022173 its reverse (371220121121), we get a palindrome (492341143294).

The spelling of 121121022173 in words is "one hundred twenty-one billion, one hundred twenty-one million, twenty-two thousand, one hundred seventy-three".