1213240423343 has 16 divisors (see below), whose sum is σ = 1358026504800. Its totient is φ = 1076171806080.

The previous prime is 1213240423333. The next prime is 1213240423429. The reversal of 1213240423343 is 3433240423121.

It is a cyclic number.

It is not a de Polignac number, because 1213240423343 - 2²² = 1213236229039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213240423333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7546388 + ... + 7705481.

It is an arithmetic number, because the mean of its divisors is an integer number (84876656550).

Almost surely, 2^{1213240423343} is an apocalyptic number.

1213240423343 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1213240423343 is a deficient number, since it is larger than the sum of its proper divisors (144786081457).

1213240423343 is a wasteful number, since it uses less digits than its factorization.

1213240423343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15252122.

The product of its (nonzero) digits is 41472, while the sum is 32.

Adding to 1213240423343 its reverse (3433240423121), we get a palindrome (4646480846464).

The spelling of 1213240423343 in words is "one trillion, two hundred thirteen billion, two hundred forty million, four hundred twenty-three thousand, three hundred forty-three".