20213331133 has 2 divisors, whose sum is σ = 20213331134. Its totient is φ = 20213331132.

The previous prime is 20213331121. The next prime is 20213331163. The reversal of 20213331133 is 33113331202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18787362489 + 1425968644 = 137067^2 + 37762^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213331133 - 2⁵ = 20213331101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20213331113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106665566 + 10106665567.

It is an arithmetic number, because the mean of its divisors is an integer number (10106665567).

Almost surely, 2^20213331133 is an apocalyptic number.

It is an amenable number.

20213331133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213331133 is an equidigital number, since it uses as much as digits as its factorization.

20213331133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 20213331133 its reverse (33113331202), we get a palindrome (53326662335).

The spelling of 20213331133 in words is "twenty billion, two hundred thirteen million, three hundred thirty-one thousand, one hundred thirty-three".