3121213673 has 2 divisors, whose sum is σ = 3121213674. Its totient is φ = 3121213672.

The previous prime is 3121213637. The next prime is 3121213679. The reversal of 3121213673 is 3763121213.

3121213673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (3121213637) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2950336489 + 170877184 = 54317^2 + 13072^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121213673 - 2¹⁶ = 3121148137 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121213679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560606836 + 1560606837.

It is an arithmetic number, because the mean of its divisors is an integer number (1560606837).

Almost surely, 2^3121213673 is an apocalyptic number.

It is an amenable number.

3121213673 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121213673 is an equidigital number, since it uses as much as digits as its factorization.

3121213673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 3121213673 is about 55867.8232348460. The cubic root of 3121213673 is about 1461.4181618138.

Adding to 3121213673 its reverse (3763121213), we get a palindrome (6884334886).

The spelling of 3121213673 in words is "three billion, one hundred twenty-one million, two hundred thirteen thousand, six hundred seventy-three".