33112019981 has 2 divisors, whose sum is σ = 33112019982. Its totient is φ = 33112019980.

The previous prime is 33112019953. The next prime is 33112020037. The reversal of 33112019981 is 18991021133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32990909956 + 121110025 = 181634^2 + 11005^2 .

It is a cyclic number.

It is not a de Polignac number, because 33112019981 - 2²² = 33107825677 is a prime.

It is a super-2 number, since 2×33112019981² (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 (33112099981) 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, 16556009990 + 16556009991.

It is an arithmetic number, because the mean of its divisors is an integer number (16556009991).

Almost surely, 2^33112019981 is an apocalyptic number.

It is an amenable number.

33112019981 is a deficient number, since it is larger than the sum of its proper divisors (1).

33112019981 is an equidigital number, since it uses as much as digits as its factorization.

33112019981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 33112019981 in words is "thirty-three billion, one hundred twelve million, nineteen thousand, nine hundred eighty-one".