1231421313469 has 2 divisors, whose sum is σ = 1231421313470. Its totient is φ = 1231421313468.

The previous prime is 1231421313457. The next prime is 1231421313511. The reversal of 1231421313469 is 9643131241321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1121968192900 + 109453120569 = 1059230^2 + 330837^2 .

It is an emirp because it is prime and its reverse (9643131241321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1231421313469 - 2⁷ = 1231421313341 is a prime.

It is a super-2 number, since 2×1231421313469² (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 (1231421313449) 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, 615710656734 + 615710656735.

It is an arithmetic number, because the mean of its divisors is an integer number (615710656735).

Almost surely, 2^{1231421313469} is an apocalyptic number.

It is an amenable number.

1231421313469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231421313469 is an equidigital number, since it uses as much as digits as its factorization.

1231421313469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The spelling of 1231421313469 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-one million, three hundred thirteen thousand, four hundred sixty-nine".