2001232010081 has 2 divisors, whose sum is σ = 2001232010082. Its totient is φ = 2001232010080.

The previous prime is 2001232010053. The next prime is 2001232010111. The reversal of 2001232010081 is 1800102321002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1981788217600 + 19443792481 = 1407760^2 + 139441^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001232010081 - 2³⁴ = 1984052140897 is a prime.

It is a super-2 number, since 2×2001232010081² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001232030081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000616005040 + 1000616005041.

It is an arithmetic number, because the mean of its divisors is an integer number (1000616005041).

Almost surely, 2^{2001232010081} is an apocalyptic number.

It is an amenable number.

2001232010081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001232010081 is an equidigital number, since it uses as much as digits as its factorization.

2001232010081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 2001232010081 its reverse (1800102321002), we get a palindrome (3801334331083).

The spelling of 2001232010081 in words is "two trillion, one billion, two hundred thirty-two million, ten thousand, eighty-one".