101212221201173 has 2 divisors, whose sum is σ = 101212221201174. Its totient is φ = 101212221201172.

The previous prime is 101212221201107. The next prime is 101212221201187. The reversal of 101212221201173 is 371102122212101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78498589963249 + 22713631237924 = 8859943^2 + 4765882^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212221201173 - 2¹² = 101212221197077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101212221201473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606110600586 + 50606110600587.

It is an arithmetic number, because the mean of its divisors is an integer number (50606110600587).

Almost surely, 2^{101212221201173} is an apocalyptic number.

It is an amenable number.

101212221201173 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212221201173 is an equidigital number, since it uses as much as digits as its factorization.

101212221201173 is an evil number, because the sum of its binary digits is even.

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

Adding to 101212221201173 its reverse (371102122212101), we get a palindrome (472314343413274).

The spelling of 101212221201173 in words is "one hundred one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred one thousand, one hundred seventy-three".