3123111121 has 8 divisors (see below), whose sum is σ = 3364237800. Its totient is φ = 2882111232.

The previous prime is 3123111091. The next prime is 3123111161. The reversal of 3123111121 is 1211113213.

It is a happy number.

3123111121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5452225 + 3117658896 = 2335^2 + 55836^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3123111121 is a prime.

It is a super-2 number, since 2×3123111121² = 19507646148227753282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3123111095 and 3123111104.

It is not an unprimeable number, because it can be changed into a prime (3123111161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22971 + ... + 82303.

It is an arithmetic number, because the mean of its divisors is an integer number (420529725).

Almost surely, 2^3123111121 is an apocalyptic number.

It is an amenable number.

3123111121 is a deficient number, since it is larger than the sum of its proper divisors (241126679).

3123111121 is a wasteful number, since it uses less digits than its factorization.

3123111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63395.

The product of its digits is 36, while the sum is 16.

The square root of 3123111121 is about 55884.8022363862. The cubic root of 3123111121 is about 1461.7142435664.

Adding to 3123111121 its reverse (1211113213), we get a palindrome (4334224334).

It can be divided in two parts, 3123 and 111121, that added together give a square (114244 = 338²).

The spelling of 3123111121 in words is "three billion, one hundred twenty-three million, one hundred eleven thousand, one hundred twenty-one".