121021101222173 has 2 divisors, whose sum is σ = 121021101222174. Its totient is φ = 121021101222172.

The previous prime is 121021101222163. The next prime is 121021101222239. The reversal of 121021101222173 is 371222101120121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74715226577209 + 46305874644964 = 8643797^2 + 6804842^2 .

It is an emirp because it is prime and its reverse (371222101120121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121021101222173 - 2¹⁰ = 121021101221149 is a prime.

It is a super-2 number, since 2×121021101222173² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121021101222163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510550611086 + 60510550611087.

It is an arithmetic number, because the mean of its divisors is an integer number (60510550611087).

Almost surely, 2^{121021101222173} is an apocalyptic number.

It is an amenable number.

121021101222173 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021101222173 is an equidigital number, since it uses as much as digits as its factorization.

121021101222173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

Adding to 121021101222173 its reverse (371222101120121), we get a palindrome (492243202342294).

The spelling of 121021101222173 in words is "one hundred twenty-one trillion, twenty-one billion, one hundred one million, two hundred twenty-two thousand, one hundred seventy-three".