20212021133 has 2 divisors, whose sum is σ = 20212021134. Its totient is φ = 20212021132.

The previous prime is 20212021099. The next prime is 20212021147. The reversal of 20212021133 is 33112021202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20167692169 + 44328964 = 142013^2 + 6658^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212021133 - 2⁸ = 20212020877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212021433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106010566 + 10106010567.

It is an arithmetic number, because the mean of its divisors is an integer number (10106010567).

Almost surely, 2^20212021133 is an apocalyptic number.

It is an amenable number.

20212021133 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212021133 is an equidigital number, since it uses as much as digits as its factorization.

20212021133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20212021133 its reverse (33112021202), we get a palindrome (53324042335).

The spelling of 20212021133 in words is "twenty billion, two hundred twelve million, twenty-one thousand, one hundred thirty-three".