3121312223 has 8 divisors (see below), whose sum is σ = 3187401360. Its totient is φ = 3055662720.

The previous prime is 3121312213. The next prime is 3121312279. The reversal of 3121312223 is 3222131213.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121312223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121312195 and 3121312204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121312213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95540 + ... + 123977.

It is an arithmetic number, because the mean of its divisors is an integer number (398425170).

Almost surely, 2^3121312223 is an apocalyptic number.

3121312223 is a deficient number, since it is larger than the sum of its proper divisors (66089137).

3121312223 is a wasteful number, since it uses less digits than its factorization.

3121312223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219817.

The product of its digits is 432, while the sum is 20.

The square root of 3121312223 is about 55868.7052203646. The cubic root of 3121312223 is about 1461.4335427157.

Adding to 3121312223 its reverse (3222131213), we get a palindrome (6343443436).

The spelling of 3121312223 in words is "three billion, one hundred twenty-one million, three hundred twelve thousand, two hundred twenty-three".