3121244391 has 8 divisors (see below), whose sum is σ = 4177131120. Its totient is φ = 2073093632.

The previous prime is 3121244389. The next prime is 3121244447. The reversal of 3121244391 is 1934421213.

3121244391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 3121244391 - 2¹ = 3121244389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121224391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1933050 + ... + 1934663.

It is an arithmetic number, because the mean of its divisors is an integer number (522141390).

Almost surely, 2^3121244391 is an apocalyptic number.

3121244391 is a deficient number, since it is larger than the sum of its proper divisors (1055886729).

3121244391 is a wasteful number, since it uses less digits than its factorization.

3121244391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867985.

The product of its digits is 5184, while the sum is 30.

The square root of 3121244391 is about 55868.0981509126. The cubic root of 3121244391 is about 1461.4229560701.

The spelling of 3121244391 in words is "three billion, one hundred twenty-one million, two hundred forty-four thousand, three hundred ninety-one".