21160240133 has 2 divisors, whose sum is σ = 21160240134. Its totient is φ = 21160240132.

The previous prime is 21160240111. The next prime is 21160240151. The reversal of 21160240133 is 33104206112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19253782564 + 1906457569 = 138758^2 + 43663^2 .

It is a cyclic number.

It is not a de Polignac number, because 21160240133 - 2¹⁰ = 21160239109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21160240099 and 21160240108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21160240193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10580120066 + 10580120067.

It is an arithmetic number, because the mean of its divisors is an integer number (10580120067).

Almost surely, 2^21160240133 is an apocalyptic number.

It is an amenable number.

21160240133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21160240133 is an equidigital number, since it uses as much as digits as its factorization.

21160240133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21160240133 its reverse (33104206112), we get a palindrome (54264446245).

The spelling of 21160240133 in words is "twenty-one billion, one hundred sixty million, two hundred forty thousand, one hundred thirty-three".