21031133203133 has 2 divisors, whose sum is σ = 21031133203134. Its totient is φ = 21031133203132.

The previous prime is 21031133203111. The next prime is 21031133203189. The reversal of 21031133203133 is 33130233113012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17516719348804 + 3514413854329 = 4185298^2 + 1874677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031133203133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21031133203733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515566601566 + 10515566601567.

It is an arithmetic number, because the mean of its divisors is an integer number (10515566601567).

Almost surely, 2^{21031133203133} is an apocalyptic number.

It is an amenable number.

21031133203133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21031133203133 is an equidigital number, since it uses as much as digits as its factorization.

21031133203133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 21031133203133 its reverse (33130233113012), we get a palindrome (54161366316145).

The spelling of 21031133203133 in words is "twenty-one trillion, thirty-one billion, one hundred thirty-three million, two hundred three thousand, one hundred thirty-three".