20012111233 has 4 divisors (see below), whose sum is σ = 20169687040. Its totient is φ = 19854535428.

The previous prime is 20012111201. The next prime is 20012111261. The reversal of 20012111233 is 33211121002.

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 not a de Polignac number, because 20012111233 - 2⁵ = 20012111201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012111263) 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, 78787713 + ... + 78787966.

It is an arithmetic number, because the mean of its divisors is an integer number (5042421760).

Almost surely, 2^20012111233 is an apocalyptic number.

It is an amenable number.

20012111233 is a deficient number, since it is larger than the sum of its proper divisors (157575807).

20012111233 is a wasteful number, since it uses less digits than its factorization.

20012111233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157575806.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20012111233 its reverse (33211121002), we get a palindrome (53223232235).

The spelling of 20012111233 in words is "twenty billion, twelve million, one hundred eleven thousand, two hundred thirty-three".