7113121 has 4 divisors (see below), whose sum is σ = 7264512. Its totient is φ = 6961732.

The previous prime is 7113109. The next prime is 7113133. The reversal of 7113121 is 1213117.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (7113109) and next prime (7113133).

It is a cyclic number.

It is not a de Polignac number, because 7113121 - 2¹⁷ = 6982049 is a prime.

It is a Duffinian number.

7113121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 7113095 and 7113104.

It is not an unprimeable number, because it can be changed into a prime (7113101) 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, 75625 + ... + 75718.

It is an arithmetic number, because the mean of its divisors is an integer number (1816128).

Almost surely, 2^7113121 is an apocalyptic number.

It is an amenable number.

7113121 is a deficient number, since it is larger than the sum of its proper divisors (151391).

7113121 is a wasteful number, since it uses less digits than its factorization.

7113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151390.

The product of its digits is 42, while the sum is 16.

The square root of 7113121 is about 2667.0434942085. The cubic root of 7113121 is about 192.3180582597.

Adding to 7113121 its reverse (1213117), we get a palindrome (8326238).

The spelling of 7113121 in words is "seven million, one hundred thirteen thousand, one hundred twenty-one".