10000133219981 has 2 divisors, whose sum is σ = 10000133219982. Its totient is φ = 10000133219980.

The previous prime is 10000133219953. The next prime is 10000133220023. The reversal of 10000133219981 is 18991233100001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5304499922500 + 4695633297481 = 2303150^2 + 2166941^2 .

It is a cyclic number.

It is not a de Polignac number, because 10000133219981 - 2¹⁴ = 10000133203597 is a prime.

It is a super-2 number, since 2×10000133219981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10000133213981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000066609990 + 5000066609991.

It is an arithmetic number, because the mean of its divisors is an integer number (5000066609991).

Almost surely, 2^{10000133219981} is an apocalyptic number.

It is an amenable number.

10000133219981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10000133219981 is an equidigital number, since it uses as much as digits as its factorization.

10000133219981 is an evil number, because the sum of its binary digits is even.

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

Adding to 10000133219981 its reverse (18991233100001), we get a palindrome (28991366319982).

The spelling of 10000133219981 in words is "ten trillion, one hundred thirty-three million, two hundred nineteen thousand, nine hundred eighty-one".