33875801821 has 2 divisors, whose sum is σ = 33875801822. Its totient is φ = 33875801820.

The previous prime is 33875801809. The next prime is 33875801833. The reversal of 33875801821 is 12810857833.

It is a balanced prime because it is at equal distance from previous prime (33875801809) and next prime (33875801833).

It can be written as a sum of positive squares in only one way, i.e., 33521948100 + 353853721 = 183090^2 + 18811^2 .

It is an emirp because it is prime and its reverse (12810857833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 33875801821 - 2²⁵ = 33842247389 is a prime.

It is a super-2 number, since 2×33875801821² (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 (33875801801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16937900910 + 16937900911.

It is an arithmetic number, because the mean of its divisors is an integer number (16937900911).

Almost surely, 2^33875801821 is an apocalyptic number.

It is an amenable number.

33875801821 is a deficient number, since it is larger than the sum of its proper divisors (1).

33875801821 is an equidigital number, since it uses as much as digits as its factorization.

33875801821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 33875801821 in words is "thirty-three billion, eight hundred seventy-five million, eight hundred one thousand, eight hundred twenty-one".