20001123229 has 2 divisors, whose sum is σ = 20001123230. Its totient is φ = 20001123228.

The previous prime is 20001123221. The next prime is 20001123253. The reversal of 20001123229 is 92232110002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19767797604 + 233325625 = 140598^2 + 15275^2 .

It is a cyclic number.

It is not a de Polignac number, because 20001123229 - 2³ = 20001123221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001123221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000561614 + 10000561615.

It is an arithmetic number, because the mean of its divisors is an integer number (10000561615).

Almost surely, 2^20001123229 is an apocalyptic number.

It is an amenable number.

20001123229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001123229 is an equidigital number, since it uses as much as digits as its factorization.

20001123229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The spelling of 20001123229 in words is "twenty billion, one million, one hundred twenty-three thousand, two hundred twenty-nine".