3121222223 has 4 divisors (see below), whose sum is σ = 3567111120. Its totient is φ = 2675333328.

The previous prime is 3121222217. The next prime is 3121222243. The reversal of 3121222223 is 3222221213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3222221213 = 619 ⋅5205527.

It is a cyclic number.

It is not a de Polignac number, because 3121222223 - 2¹⁴ = 3121205839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3121222195 and 3121222204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121222243) 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, 222944438 + ... + 222944451.

It is an arithmetic number, because the mean of its divisors is an integer number (891777780).

Almost surely, 2^3121222223 is an apocalyptic number.

3121222223 is a deficient number, since it is larger than the sum of its proper divisors (445888897).

3121222223 is an equidigital number, since it uses as much as digits as its factorization.

3121222223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445888896.

The product of its digits is 576, while the sum is 20.

The square root of 3121222223 is about 55867.8997546892. The cubic root of 3121222223 is about 1461.4194962427.

Adding to 3121222223 its reverse (3222221213), we get a palindrome (6343443436).

It can be divided in two parts, 31212 and 22223, that added together give a palindrome (53435).

The spelling of 3121222223 in words is "three billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-three".