3121221123 has 12 divisors (see below), whose sum is σ = 4521353200. Its totient is φ = 2074849776.

The previous prime is 3121221121. The next prime is 3121221163. The reversal of 3121221123 is 3211221213.

It is not a de Polignac number, because 3121221123 - 2¹ = 3121221121 is a prime.

It is a super-2 number, since 2×3121221123² = 19484042597322762258, 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 = 3121221096 and 3121221105.

It is not an unprimeable number, because it can be changed into a prime (3121221121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 493711 + ... + 499992.

Almost surely, 2^3121221123 is an apocalyptic number.

3121221123 is a deficient number, since it is larger than the sum of its proper divisors (1400132077).

3121221123 is a wasteful number, since it uses less digits than its factorization.

3121221123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994058 (or 994055 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 3121221123 is about 55867.8899100369. The cubic root of 3121221123 is about 1461.4193245619.

Adding to 3121221123 its reverse (3211221213), we get a palindrome (6332442336).

The spelling of 3121221123 in words is "three billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-three".