3111003121 has 4 divisors (see below), whose sum is σ = 3128985972. Its totient is φ = 3093020272.

The previous prime is 3111003107. The next prime is 3111003157. The reversal of 3111003121 is 1213001113.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2168206096 + 942797025 = 46564^2 + 30705^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111003121 - 2⁵ = 3111003089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3111000121) 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, 8991166 + ... + 8991511.

It is an arithmetic number, because the mean of its divisors is an integer number (782246493).

Almost surely, 2^3111003121 is an apocalyptic number.

It is an amenable number.

3111003121 is a deficient number, since it is larger than the sum of its proper divisors (17982851).

3111003121 is a wasteful number, since it uses less digits than its factorization.

3111003121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17982850.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 3111003121 is about 55776.3670473436. The cubic root of 3111003121 is about 1459.8228222163.

Adding to 3111003121 its reverse (1213001113), we get a palindrome (4324004234).

The spelling of 3111003121 in words is "three billion, one hundred eleven million, three thousand, one hundred twenty-one".