3121001213 has 4 divisors (see below), whose sum is σ = 3404728608. Its totient is φ = 2837273820.

The previous prime is 3121001209. The next prime is 3121001227.

3121001213 is nontrivially palindromic in base 10.

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.

It is a cyclic number.

It is not a de Polignac number, because 3121001213 - 2² = 3121001209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121001243) 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, 141863681 + ... + 141863702.

It is an arithmetic number, because the mean of its divisors is an integer number (851182152).

Almost surely, 2^3121001213 is an apocalyptic number.

It is an amenable number.

3121001213 is a deficient number, since it is larger than the sum of its proper divisors (283727395).

3121001213 is a wasteful number, since it uses less digits than its factorization.

3121001213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283727394.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 3121001213 is about 55865.9217502047. The cubic root of 3121001213 is about 1461.3850016416.

It can be divided in two parts, 312100 and 1213, that added together give a palindrome (313313).

The spelling of 3121001213 in words is "three billion, one hundred twenty-one million, one thousand, two hundred thirteen".