2001123100033 has 4 divisors (see below), whose sum is σ = 2055207508180. Its totient is φ = 1947038691888.

The previous prime is 2001123100021. The next prime is 2001123100043. The reversal of 2001123100033 is 3300013211002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1832685090289 + 168438009744 = 1353767^2 + 410412^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001123100033 - 2¹³ = 2001123091841 is a prime.

It is a super-3 number, since 3×2001123100033³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001123100003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27042204018 + ... + 27042204091.

It is an arithmetic number, because the mean of its divisors is an integer number (513801877045).

Almost surely, 2^{2001123100033} is an apocalyptic number.

It is an amenable number.

2001123100033 is a deficient number, since it is larger than the sum of its proper divisors (54084408147).

2001123100033 is an equidigital number, since it uses as much as digits as its factorization.

2001123100033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54084408146.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 2001123100033 its reverse (3300013211002), we get a palindrome (5301136311035).

The spelling of 2001123100033 in words is "two trillion, one billion, one hundred twenty-three million, one hundred thousand, thirty-three".