3121213441 has 4 divisors (see below), whose sum is σ = 3121350400. Its totient is φ = 3121076484.

The previous prime is 3121213411. The next prime is 3121213483. The reversal of 3121213441 is 1443121213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1443121213 = 139 ⋅10382167.

It is a cyclic number.

It is not a de Polignac number, because 3121213441 - 2⁷ = 3121213313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121213411) 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, 25161 + ... + 82918.

It is an arithmetic number, because the mean of its divisors is an integer number (780337600).

Almost surely, 2^3121213441 is an apocalyptic number.

It is an amenable number.

3121213441 is a deficient number, since it is larger than the sum of its proper divisors (136959).

3121213441 is a wasteful number, since it uses less digits than its factorization.

3121213441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136958.

The product of its digits is 576, while the sum is 22.

The square root of 3121213441 is about 55867.8211585166. The cubic root of 3121213441 is about 1461.4181256047.

Adding to 3121213441 its reverse (1443121213), we get a palindrome (4564334654).

The spelling of 3121213441 in words is "three billion, one hundred twenty-one million, two hundred thirteen thousand, four hundred forty-one".