1001211101173 has 2 divisors, whose sum is σ = 1001211101174. Its totient is φ = 1001211101172.

The previous prime is 1001211101087. The next prime is 1001211101183. The reversal of 1001211101173 is 3711011121001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726275519524 + 274935581649 = 852218^2 + 524343^2 .

It is an emirp because it is prime and its reverse (3711011121001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1001211101173 - 2²⁵ = 1001177546741 is a prime.

It is a super-3 number, since 3×1001211101173³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 1001211101173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001211101183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500605550586 + 500605550587.

It is an arithmetic number, because the mean of its divisors is an integer number (500605550587).

Almost surely, 2^{1001211101173} is an apocalyptic number.

It is an amenable number.

1001211101173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001211101173 is an equidigital number, since it uses as much as digits as its factorization.

1001211101173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42, while the sum is 19.

Adding to 1001211101173 its reverse (3711011121001), we get a palindrome (4712222222174).

The spelling of 1001211101173 in words is "one trillion, one billion, two hundred eleven million, one hundred one thousand, one hundred seventy-three".