1211132172175 has 24 divisors (see below), whose sum is σ = 1514283309824. Its totient is φ = 960880203360.

The previous prime is 1211132172163. The next prime is 1211132172181. The reversal of 1211132172175 is 5712712311121.

It is not a de Polignac number, because 1211132172175 - 2⁵ = 1211132172143 is a prime.

It is a super-2 number, since 2×1211132172175² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211132172175.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1565764 + ... + 2207686.

Almost surely, 2^{1211132172175} is an apocalyptic number.

1211132172175 is a deficient number, since it is larger than the sum of its proper divisors (303151137649).

1211132172175 is a wasteful number, since it uses less digits than its factorization.

1211132172175 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642559 (or 642554 counting only the distinct ones).

The product of its digits is 5880, while the sum is 34.

Adding to 1211132172175 its reverse (5712712311121), we get a palindrome (6923844483296).

The spelling of 1211132172175 in words is "one trillion, two hundred eleven billion, one hundred thirty-two million, one hundred seventy-two thousand, one hundred seventy-five".