3121111213 has 8 divisors (see below), whose sum is σ = 3405432096. Its totient is φ = 2836887600.

The previous prime is 3121111211. The next prime is 3121111237.

It is a happy number.

3121111213 is nontrivially palindromic in base 10.

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 3121111213 - 2¹ = 3121111211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121111211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53670 + ... + 95512.

It is an arithmetic number, because the mean of its divisors is an integer number (425679012).

Almost surely, 2^3121111213 is an apocalyptic number.

It is an amenable number.

3121111213 is a deficient number, since it is larger than the sum of its proper divisors (284320883).

3121111213 is a wasteful number, since it uses less digits than its factorization.

3121111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48635.

The product of its digits is 36, while the sum is 16.

The square root of 3121111213 is about 55866.9062415309. The cubic root of 3121111213 is about 1461.4021703268.

It can be divided in two parts, 31211 and 11213, that added together give a palindrome (42424).

The spelling of 3121111213 in words is "three billion, one hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".