3121664101 has 2 divisors, whose sum is σ = 3121664102. Its totient is φ = 3121664100.

The previous prime is 3121664093. The next prime is 3121664111. The reversal of 3121664101 is 1014661213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3084136225 + 37527876 = 55535^2 + 6126^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121664101 - 2³ = 3121664093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121664111) 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 as a sum of consecutive naturals, namely, 1560832050 + 1560832051.

It is an arithmetic number, because the mean of its divisors is an integer number (1560832051).

Almost surely, 2^3121664101 is an apocalyptic number.

It is an amenable number.

3121664101 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121664101 is an equidigital number, since it uses as much as digits as its factorization.

3121664101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 3121664101 is about 55871.8542828140. The cubic root of 3121664101 is about 1461.4884583999.

The spelling of 3121664101 in words is "three billion, one hundred twenty-one million, six hundred sixty-four thousand, one hundred one".