33212389381 has 2 divisors, whose sum is σ = 33212389382. Its totient is φ = 33212389380.

The previous prime is 33212389351. The next prime is 33212389387. The reversal of 33212389381 is 18398321233.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32886009025 + 326380356 = 181345^2 + 18066^2 .

It is an emirp because it is prime and its reverse (18398321233) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33212389381 - 2⁵ = 33212389349 is a prime.

It is a super-2 number, since 2×33212389381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33212389387) 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, 16606194690 + 16606194691.

It is an arithmetic number, because the mean of its divisors is an integer number (16606194691).

Almost surely, 2^33212389381 is an apocalyptic number.

It is an amenable number.

33212389381 is a deficient number, since it is larger than the sum of its proper divisors (1).

33212389381 is an equidigital number, since it uses as much as digits as its factorization.

33212389381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The spelling of 33212389381 in words is "thirty-three billion, two hundred twelve million, three hundred eighty-nine thousand, three hundred eighty-one".