20111200133 has 2 divisors, whose sum is σ = 20111200134. Its totient is φ = 20111200132.

The previous prime is 20111200099. The next prime is 20111200139. The reversal of 20111200133 is 33100211102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13624025284 + 6487174849 = 116722^2 + 80543^2 .

It is a cyclic number.

It is not a de Polignac number, because 20111200133 - 2¹⁰ = 20111199109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20111200139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055600066 + 10055600067.

It is an arithmetic number, because the mean of its divisors is an integer number (10055600067).

Almost surely, 2^20111200133 is an apocalyptic number.

It is an amenable number.

20111200133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20111200133 is an equidigital number, since it uses as much as digits as its factorization.

20111200133 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 14.

Adding to 20111200133 its reverse (33100211102), we get a palindrome (53211411235).

The spelling of 20111200133 in words is "twenty billion, one hundred eleven million, two hundred thousand, one hundred thirty-three".