1231202423443 has 4 divisors (see below), whose sum is σ = 1231204653208. Its totient is φ = 1231200193680.

The previous prime is 1231202423419. The next prime is 1231202423447. The reversal of 1231202423443 is 3443242021321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1231202423443 - 2¹³ = 1231202415251 is a prime.

It is a super-4 number, since 4×1231202423443⁴ (a number of 49 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231202423447) 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, 394780 + ... + 1618102.

It is an arithmetic number, because the mean of its divisors is an integer number (307801163302).

Almost surely, 2^{1231202423443} is an apocalyptic number.

1231202423443 is a deficient number, since it is larger than the sum of its proper divisors (2229765).

1231202423443 is a wasteful number, since it uses less digits than its factorization.

1231202423443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229764.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 1231202423443 its reverse (3443242021321), we get a palindrome (4674444444764).

The spelling of 1231202423443 in words is "one trillion, two hundred thirty-one billion, two hundred two million, four hundred twenty-three thousand, four hundred forty-three".