7111211021171 has 4 divisors (see below), whose sum is σ = 7420394109072. Its totient is φ = 6802027933272.

The previous prime is 7111211021153. The next prime is 7111211021183. The reversal of 7111211021171 is 1711201121117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7111211021171 - 2³⁸ = 6836333114227 is a prime.

It is a super-2 number, since 2×7111211021171² (a number of 27 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 7111211021171.

It is not an unprimeable number, because it can be changed into a prime (7111211021471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154591543916 + ... + 154591543961.

It is an arithmetic number, because the mean of its divisors is an integer number (1855098527268).

Almost surely, 2^{7111211021171} is an apocalyptic number.

7111211021171 is a deficient number, since it is larger than the sum of its proper divisors (309183087901).

7111211021171 is a wasteful number, since it uses less digits than its factorization.

7111211021171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309183087900.

The product of its (nonzero) digits is 196, while the sum is 26.

Adding to 7111211021171 its reverse (1711201121117), we get a palindrome (8822412142288).

The spelling of 7111211021171 in words is "seven trillion, one hundred eleven billion, two hundred eleven million, twenty-one thousand, one hundred seventy-one".