21112233229 has 2 divisors, whose sum is σ = 21112233230. Its totient is φ = 21112233228.

The previous prime is 21112233227. The next prime is 21112233251. The reversal of 21112233229 is 92233221112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21017170729 + 95062500 = 144973^2 + 9750^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112233229 - 2¹ = 21112233227 is a prime.

Together with 21112233227, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21112233197 and 21112233206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112233221) 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, 10556116614 + 10556116615.

It is an arithmetic number, because the mean of its divisors is an integer number (10556116615).

Almost surely, 2^21112233229 is an apocalyptic number.

It is an amenable number.

21112233229 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112233229 is an equidigital number, since it uses as much as digits as its factorization.

21112233229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The spelling of 21112233229 in words is "twenty-one billion, one hundred twelve million, two hundred thirty-three thousand, two hundred twenty-nine".