20001211033 has 4 divisors (see below), whose sum is σ = 20870828928. Its totient is φ = 19131593140.

The previous prime is 20001211019. The next prime is 20001211091. The reversal of 20001211033 is 33011210002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001211033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001211133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434808913 + ... + 434808958.

It is an arithmetic number, because the mean of its divisors is an integer number (5217707232).

Almost surely, 2^20001211033 is an apocalyptic number.

20001211033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20001211033 is a deficient number, since it is larger than the sum of its proper divisors (869617895).

20001211033 is an equidigital number, since it uses as much as digits as its factorization.

20001211033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869617894.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20001211033 its reverse (33011210002), we get a palindrome (53012421035).

The spelling of 20001211033 in words is "twenty billion, one million, two hundred eleven thousand, thirty-three".