2134202021309 has 2 divisors, whose sum is σ = 2134202021310. Its totient is φ = 2134202021308.

The previous prime is 2134202021297. The next prime is 2134202021387. The reversal of 2134202021309 is 9031202024312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1351631784409 + 782570236900 = 1162597^2 + 884630^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134202021309 - 2³² = 2129907054013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2134202021509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067101010654 + 1067101010655.

It is an arithmetic number, because the mean of its divisors is an integer number (1067101010655).

Almost surely, 2^{2134202021309} is an apocalyptic number.

It is an amenable number.

2134202021309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134202021309 is an equidigital number, since it uses as much as digits as its factorization.

2134202021309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 2134202021309 in words is "two trillion, one hundred thirty-four billion, two hundred two million, twenty-one thousand, three hundred nine".