2142243364309 has 2 divisors, whose sum is σ = 2142243364310. Its totient is φ = 2142243364308.

The previous prime is 2142243364291. The next prime is 2142243364337. The reversal of 2142243364309 is 9034633422412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2113307653284 + 28935711025 = 1453722^2 + 170105^2 .

It is a cyclic number.

It is not a de Polignac number, because 2142243364309 - 2⁹ = 2142243363797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142243374309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071121682154 + 1071121682155.

It is an arithmetic number, because the mean of its divisors is an integer number (1071121682155).

Almost surely, 2^{2142243364309} is an apocalyptic number.

It is an amenable number.

2142243364309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142243364309 is an equidigital number, since it uses as much as digits as its factorization.

2142243364309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 2142243364309 in words is "two trillion, one hundred forty-two billion, two hundred forty-three million, three hundred sixty-four thousand, three hundred nine".