20121212329 has 2 divisors, whose sum is σ = 20121212330. Its totient is φ = 20121212328.

The previous prime is 20121212317. The next prime is 20121212341. The reversal of 20121212329 is 92321212102.

It is a balanced prime because it is at equal distance from previous prime (20121212317) and next prime (20121212341).

It can be written as a sum of positive squares in only one way, i.e., 13793328025 + 6327884304 = 117445^2 + 79548^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121212329 - 2¹³ = 20121204137 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121212729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060606164 + 10060606165.

It is an arithmetic number, because the mean of its divisors is an integer number (10060606165).

Almost surely, 2^20121212329 is an apocalyptic number.

It is an amenable number.

20121212329 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121212329 is an equidigital number, since it uses as much as digits as its factorization.

20121212329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 20121212329 in words is "twenty billion, one hundred twenty-one million, two hundred twelve thousand, three hundred twenty-nine".