3218121971 has 2 divisors, whose sum is σ = 3218121972. Its totient is φ = 3218121970.

The previous prime is 3218121919. The next prime is 3218121989. The reversal of 3218121971 is 1791218123.

It is a strong prime.

It is an emirp because it is prime and its reverse (1791218123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3218121971 - 2¹⁰ = 3218120947 is a prime.

It is not a weakly prime, because it can be changed into another prime (3218123971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609060985 + 1609060986.

It is an arithmetic number, because the mean of its divisors is an integer number (1609060986).

Almost surely, 2^3218121971 is an apocalyptic number.

3218121971 is a deficient number, since it is larger than the sum of its proper divisors (1).

3218121971 is an equidigital number, since it uses as much as digits as its factorization.

3218121971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 35.

The square root of 3218121971 is about 56728.4934666874. The cubic root of 3218121971 is about 1476.3891111302.

The spelling of 3218121971 in words is "three billion, two hundred eighteen million, one hundred twenty-one thousand, nine hundred seventy-one".