20121340133 has 2 divisors, whose sum is σ = 20121340134. Its totient is φ = 20121340132.

The previous prime is 20121340121. The next prime is 20121340163. The reversal of 20121340133 is 33104312102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12678309604 + 7443030529 = 112598^2 + 86273^2 .

It is a cyclic number.

It is not a de Polignac number, because 20121340133 - 2⁶ = 20121340069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121340163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060670066 + 10060670067.

It is an arithmetic number, because the mean of its divisors is an integer number (10060670067).

Almost surely, 2^20121340133 is an apocalyptic number.

It is an amenable number.

20121340133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121340133 is an equidigital number, since it uses as much as digits as its factorization.

20121340133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20121340133 its reverse (33104312102), we get a palindrome (53225652235).

The spelling of 20121340133 in words is "twenty billion, one hundred twenty-one million, three hundred forty thousand, one hundred thirty-three".