32001109981 has 2 divisors, whose sum is σ = 32001109982. Its totient is φ = 32001109980.

The previous prime is 32001109967. The next prime is 32001110003. The reversal of 32001109981 is 18990110023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16248600900 + 15752509081 = 127470^2 + 125509^2 .

It is a cyclic number.

It is not a de Polignac number, because 32001109981 - 2¹³ = 32001101789 is a prime.

It is a super-2 number, since 2×32001109981² (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 (32001109951) 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, 16000554990 + 16000554991.

It is an arithmetic number, because the mean of its divisors is an integer number (16000554991).

Almost surely, 2^32001109981 is an apocalyptic number.

It is an amenable number.

32001109981 is a deficient number, since it is larger than the sum of its proper divisors (1).

32001109981 is an equidigital number, since it uses as much as digits as its factorization.

32001109981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 32001109981 in words is "thirty-two billion, one million, one hundred nine thousand, nine hundred eighty-one".