20012100133 has 2 divisors, whose sum is σ = 20012100134. Its totient is φ = 20012100132.

The previous prime is 20012100079. The next prime is 20012100149. The reversal of 20012100133 is 33100121002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18762972484 + 1249127649 = 136978^2 + 35343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012100133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20012140133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006050066 + 10006050067.

It is an arithmetic number, because the mean of its divisors is an integer number (10006050067).

Almost surely, 2^20012100133 is an apocalyptic number.

It is an amenable number.

20012100133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012100133 is an equidigital number, since it uses as much as digits as its factorization.

20012100133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20012100133 its reverse (33100121002), we get a palindrome (53112221135).

The spelling of 20012100133 in words is "twenty billion, twelve million, one hundred thousand, one hundred thirty-three".