20112131033 has 4 divisors (see below), whose sum is σ = 20655702180. Its totient is φ = 19568559888.

The previous prime is 20112130999. The next prime is 20112131057. The reversal of 20112131033 is 33013121102.

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 13979988169 + 6132142864 = 118237^2 + 78308^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112131033 - 2²² = 20107936729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20112131233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271785518 + ... + 271785591.

It is an arithmetic number, because the mean of its divisors is an integer number (5163925545).

Almost surely, 2^20112131033 is an apocalyptic number.

It is an amenable number.

20112131033 is a deficient number, since it is larger than the sum of its proper divisors (543571147).

20112131033 is an equidigital number, since it uses as much as digits as its factorization.

20112131033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543571146.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 20112131033 its reverse (33013121102), we get a palindrome (53125252135).

The spelling of 20112131033 in words is "twenty billion, one hundred twelve million, one hundred thirty-one thousand, thirty-three".