1223343212431 has 4 divisors (see below), whose sum is σ = 1223346009952. Its totient is φ = 1223340414912.

The previous prime is 1223343212411. The next prime is 1223343212437. The reversal of 1223343212431 is 1342123433221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1223343212431 - 2³¹ = 1221195728783 is a prime.

It is a super-2 number, since 2×1223343212431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223343212393 and 1223343212402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223343212437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 585015 + ... + 1670008.

It is an arithmetic number, because the mean of its divisors is an integer number (305836502488).

Almost surely, 2^{1223343212431} is an apocalyptic number.

1223343212431 is a deficient number, since it is larger than the sum of its proper divisors (2797521).

1223343212431 is an equidigital number, since it uses as much as digits as its factorization.

1223343212431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797520.

The product of its digits is 20736, while the sum is 31.

Adding to 1223343212431 its reverse (1342123433221), we get a palindrome (2565466645652).

The spelling of 1223343212431 in words is "one trillion, two hundred twenty-three billion, three hundred forty-three million, two hundred twelve thousand, four hundred thirty-one".