1342643560021 has 2 divisors, whose sum is σ = 1342643560022. Its totient is φ = 1342643560020.

The previous prime is 1342643560009. The next prime is 1342643560061. The reversal of 1342643560021 is 1200653462431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 775657149796 + 566986410225 = 880714^2 + 752985^2 .

It is a cyclic number.

It is not a de Polignac number, because 1342643560021 - 2¹³ = 1342643551829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1342643560061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671321780010 + 671321780011.

It is an arithmetic number, because the mean of its divisors is an integer number (671321780011).

Almost surely, 2^{1342643560021} is an apocalyptic number.

It is an amenable number.

1342643560021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1342643560021 is an equidigital number, since it uses as much as digits as its factorization.

1342643560021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 1342643560021 in words is "one trillion, three hundred forty-two billion, six hundred forty-three million, five hundred sixty thousand, twenty-one".