20121103229 has 2 divisors, whose sum is σ = 20121103230. Its totient is φ = 20121103228.

The previous prime is 20121103187. The next prime is 20121103267. The reversal of 20121103229 is 92230112102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10542566329 + 9578536900 = 102677^2 + 97870^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121103229 - 2¹² = 20121099133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121123229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060551614 + 10060551615.

It is an arithmetic number, because the mean of its divisors is an integer number (10060551615).

Almost surely, 2^20121103229 is an apocalyptic number.

It is an amenable number.

20121103229 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121103229 is an equidigital number, since it uses as much as digits as its factorization.

20121103229 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 23.

The spelling of 20121103229 in words is "twenty billion, one hundred twenty-one million, one hundred three thousand, two hundred twenty-nine".