102220121173 has 2 divisors, whose sum is σ = 102220121174. Its totient is φ = 102220121172.

The previous prime is 102220121131. The next prime is 102220121177. The reversal of 102220121173 is 371121022201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85876544209 + 16343576964 = 293047^2 + 127842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102220121173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102220121177) 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, 51110060586 + 51110060587.

It is an arithmetic number, because the mean of its divisors is an integer number (51110060587).

Almost surely, 2^102220121173 is an apocalyptic number.

It is an amenable number.

102220121173 is a deficient number, since it is larger than the sum of its proper divisors (1).

102220121173 is an equidigital number, since it uses as much as digits as its factorization.

102220121173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 102220121173 its reverse (371121022201), we get a palindrome (473341143374).

The spelling of 102220121173 in words is "one hundred two billion, two hundred twenty million, one hundred twenty-one thousand, one hundred seventy-three".