8212139333 has 2 divisors, whose sum is σ = 8212139334. Its totient is φ = 8212139332.

The previous prime is 8212139303. The next prime is 8212139389. The reversal of 8212139333 is 3339312128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7825702369 + 386436964 = 88463^2 + 19658^2 .

It is a cyclic number.

It is not a de Polignac number, because 8212139333 - 2¹⁴ = 8212122949 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8212139293 and 8212139302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8212139303) 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, 4106069666 + 4106069667.

It is an arithmetic number, because the mean of its divisors is an integer number (4106069667).

Almost surely, 2^8212139333 is an apocalyptic number.

It is an amenable number.

8212139333 is a deficient number, since it is larger than the sum of its proper divisors (1).

8212139333 is an equidigital number, since it uses as much as digits as its factorization.

8212139333 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 8212139333 is about 90620.8548458907. The cubic root of 8212139333 is about 2017.5242790951.

The spelling of 8212139333 in words is "eight billion, two hundred twelve million, one hundred thirty-nine thousand, three hundred thirty-three".