1321425035543 has 2 divisors, whose sum is σ = 1321425035544. Its totient is φ = 1321425035542.

The previous prime is 1321425035527. The next prime is 1321425035627. The reversal of 1321425035543 is 3455305241231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321425035543 - 2⁴ = 1321425035527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321425035497 and 1321425035506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321425035743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660712517771 + 660712517772.

It is an arithmetic number, because the mean of its divisors is an integer number (660712517772).

Almost surely, 2^{1321425035543} is an apocalyptic number.

1321425035543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321425035543 is an equidigital number, since it uses as much as digits as its factorization.

1321425035543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 38.

The spelling of 1321425035543 in words is "one trillion, three hundred twenty-one billion, four hundred twenty-five million, thirty-five thousand, five hundred forty-three".