1321001420423 has 2 divisors, whose sum is σ = 1321001420424. Its totient is φ = 1321001420422.

The previous prime is 1321001420363. The next prime is 1321001420489. The reversal of 1321001420423 is 3240241001231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321001420423 - 2²² = 1320997226119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321001420923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660500710211 + 660500710212.

It is an arithmetic number, because the mean of its divisors is an integer number (660500710212).

Almost surely, 2^{1321001420423} is an apocalyptic number.

1321001420423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321001420423 is an equidigital number, since it uses as much as digits as its factorization.

1321001420423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 1321001420423 its reverse (3240241001231), we get a palindrome (4561242421654).

The spelling of 1321001420423 in words is "one trillion, three hundred twenty-one billion, one million, four hundred twenty thousand, four hundred twenty-three".