212101010111173 has 2 divisors, whose sum is σ = 212101010111174. Its totient is φ = 212101010111172.

The previous prime is 212101010111093. The next prime is 212101010111303. The reversal of 212101010111173 is 371111010101212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211315734110209 + 785276000964 = 14536703^2 + 886158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212101010111173 is a prime.

It is a super-2 number, since 2×212101010111173² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212101010111773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050505055586 + 106050505055587.

It is an arithmetic number, because the mean of its divisors is an integer number (106050505055587).

Almost surely, 2^{212101010111173} is an apocalyptic number.

It is an amenable number.

212101010111173 is a deficient number, since it is larger than the sum of its proper divisors (1).

212101010111173 is an equidigital number, since it uses as much as digits as its factorization.

212101010111173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84, while the sum is 22.

Adding to 212101010111173 its reverse (371111010101212), we get a palindrome (583212020212385).

The spelling of 212101010111173 in words is "two hundred twelve trillion, one hundred one billion, ten million, one hundred eleven thousand, one hundred seventy-three".