20311112211133 has 2 divisors, whose sum is σ = 20311112211134. Its totient is φ = 20311112211132.

The previous prime is 20311112211107. The next prime is 20311112211151. The reversal of 20311112211133 is 33111221111302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19130712533689 + 1180399677444 = 4373867^2 + 1086462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20311112211133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20311112217133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155556105566 + 10155556105567.

It is an arithmetic number, because the mean of its divisors is an integer number (10155556105567).

Almost surely, 2^{20311112211133} is an apocalyptic number.

It is an amenable number.

20311112211133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311112211133 is an equidigital number, since it uses as much as digits as its factorization.

20311112211133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 20311112211133 its reverse (33111221111302), we get a palindrome (53422333322435).

The spelling of 20311112211133 in words is "twenty trillion, three hundred eleven billion, one hundred twelve million, two hundred eleven thousand, one hundred thirty-three".