3121442243 has 4 divisors (see below), whose sum is σ = 3123314160. Its totient is φ = 3119570328.

The previous prime is 3121442213. The next prime is 3121442251. The reversal of 3121442243 is 3422441213.

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

It is a cyclic number.

It is not a de Polignac number, because 3121442243 - 2⁶ = 3121442179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121442213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933455 + ... + 936792.

It is an arithmetic number, because the mean of its divisors is an integer number (780828540).

Almost surely, 2^3121442243 is an apocalyptic number.

3121442243 is a deficient number, since it is larger than the sum of its proper divisors (1871917).

3121442243 is a wasteful number, since it uses less digits than its factorization.

3121442243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871916.

The product of its digits is 4608, while the sum is 26.

The square root of 3121442243 is about 55869.8688292715. The cubic root of 3121442243 is about 1461.4538347101.

Adding to 3121442243 its reverse (3422441213), we get a palindrome (6543883456).

The spelling of 3121442243 in words is "three billion, one hundred twenty-one million, four hundred forty-two thousand, two hundred forty-three".