20013122133 has 6 divisors (see below), whose sum is σ = 28907843094. Its totient is φ = 13342081416.

The previous prime is 20013122131. The next prime is 20013122179. The reversal of 20013122133 is 33122131002.

It can be written as a sum of positive squares in only one way, i.e., 11842227684 + 8170894449 = 108822^2 + 90393^2 .

It is not a de Polignac number, because 20013122133 - 2¹ = 20013122131 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20013122131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111840110 + ... + 1111840127.

It is an arithmetic number, because the mean of its divisors is an integer number (4817973849).

Almost surely, 2^20013122133 is an apocalyptic number.

It is an amenable number.

20013122133 is a deficient number, since it is larger than the sum of its proper divisors (8894720961).

20013122133 is a wasteful number, since it uses less digits than its factorization.

20013122133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223680243 (or 2223680240 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 20013122133 its reverse (33122131002), we get a palindrome (53135253135).

The spelling of 20013122133 in words is "twenty billion, thirteen million, one hundred twenty-two thousand, one hundred thirty-three".