201320329981 has 2 divisors, whose sum is σ = 201320329982. Its totient is φ = 201320329980.

The previous prime is 201320329937. The next prime is 201320330041. The reversal of 201320329981 is 189923023102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114727851225 + 86592478756 = 338715^2 + 294266^2 .

It is a cyclic number.

It is not a de Polignac number, because 201320329981 - 2⁷ = 201320329853 is a prime.

It is a super-2 number, since 2×201320329981² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201320329381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100660164990 + 100660164991.

It is an arithmetic number, because the mean of its divisors is an integer number (100660164991).

Almost surely, 2^201320329981 is an apocalyptic number.

It is an amenable number.

201320329981 is a deficient number, since it is larger than the sum of its proper divisors (1).

201320329981 is an equidigital number, since it uses as much as digits as its factorization.

201320329981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 201320329981 in words is "two hundred one billion, three hundred twenty million, three hundred twenty-nine thousand, nine hundred eighty-one".