2021311209133 has 2 divisors, whose sum is σ = 2021311209134. Its totient is φ = 2021311209132.

The previous prime is 2021311209107. The next prime is 2021311209143. The reversal of 2021311209133 is 3319021131202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1192260896649 + 829050312484 = 1091907^2 + 910522^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021311209133 - 2¹³ = 2021311200941 is a prime.

It is a super-2 number, since 2×2021311209133² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021311209143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010655604566 + 1010655604567.

It is an arithmetic number, because the mean of its divisors is an integer number (1010655604567).

Almost surely, 2^{2021311209133} is an apocalyptic number.

It is an amenable number.

2021311209133 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021311209133 is an equidigital number, since it uses as much as digits as its factorization.

2021311209133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 2021311209133 in words is "two trillion, twenty-one billion, three hundred eleven million, two hundred nine thousand, one hundred thirty-three".