2133851864021 has 2 divisors, whose sum is σ = 2133851864022. Its totient is φ = 2133851864020.

The previous prime is 2133851863993. The next prime is 2133851864029. The reversal of 2133851864021 is 1204681583312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1590660753796 + 543191110225 = 1261214^2 + 737015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2133851864021 - 2¹⁰ = 2133851862997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2133851864029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1066925932010 + 1066925932011.

It is an arithmetic number, because the mean of its divisors is an integer number (1066925932011).

Almost surely, 2^{2133851864021} is an apocalyptic number.

It is an amenable number.

2133851864021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2133851864021 is an equidigital number, since it uses as much as digits as its factorization.

2133851864021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 44.

The spelling of 2133851864021 in words is "two trillion, one hundred thirty-three billion, eight hundred fifty-one million, eight hundred sixty-four thousand, twenty-one".