3913210121 has 2 divisors, whose sum is σ = 3913210122. Its totient is φ = 3913210120.

The previous prime is 3913210061. The next prime is 3913210157. The reversal of 3913210121 is 1210123193.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3901376521 + 11833600 = 62461^2 + 3440^2 .

It is an emirp because it is prime and its reverse (1210123193) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3913210121 - 2⁶ = 3913210057 is a prime.

It is not a weakly prime, because it can be changed into another prime (3913216121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1956605060 + 1956605061.

It is an arithmetic number, because the mean of its divisors is an integer number (1956605061).

Almost surely, 2^3913210121 is an apocalyptic number.

It is an amenable number.

3913210121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3913210121 is an equidigital number, since it uses as much as digits as its factorization.

3913210121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 3913210121 is about 62555.6561871107. The cubic root of 3913210121 is about 1575.8361390152.

The spelling of 3913210121 in words is "three billion, nine hundred thirteen million, two hundred ten thousand, one hundred twenty-one".