1321231121383 has 2 divisors, whose sum is σ = 1321231121384. Its totient is φ = 1321231121382.

The previous prime is 1321231121369. The next prime is 1321231121459. The reversal of 1321231121383 is 3831211321231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321231121383 - 2²¹ = 1321229024231 is a prime.

It is a super-2 number, since 2×1321231121383² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321231121183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660615560691 + 660615560692.

It is an arithmetic number, because the mean of its divisors is an integer number (660615560692).

Almost surely, 2^{1321231121383} is an apocalyptic number.

1321231121383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321231121383 is an equidigital number, since it uses as much as digits as its factorization.

1321231121383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The spelling of 1321231121383 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-one million, one hundred twenty-one thousand, three hundred eighty-three".