7112721131 has 2 divisors, whose sum is σ = 7112721132. Its totient is φ = 7112721130.

The previous prime is 7112721107. The next prime is 7112721179. The reversal of 7112721131 is 1311272117.

It is a weak prime.

It is an emirp because it is prime and its reverse (1311272117) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7112721131 is a prime.

It is a super-2 number, since 2×7112721131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7112721131.

It is not a weakly prime, because it can be changed into another prime (7112721191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3556360565 + 3556360566.

It is an arithmetic number, because the mean of its divisors is an integer number (3556360566).

Almost surely, 2^7112721131 is an apocalyptic number.

7112721131 is a deficient number, since it is larger than the sum of its proper divisors (1).

7112721131 is an equidigital number, since it uses as much as digits as its factorization.

7112721131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588, while the sum is 26.

The square root of 7112721131 is about 84336.9499744922. The cubic root of 7112721131 is about 1923.1445442810.

Adding to 7112721131 its reverse (1311272117), we get a palindrome (8423993248).

The spelling of 7112721131 in words is "seven billion, one hundred twelve million, seven hundred twenty-one thousand, one hundred thirty-one".