1231133201323 has 4 divisors (see below), whose sum is σ = 1243825296280. Its totient is φ = 1218441106368.

The previous prime is 1231133201321. The next prime is 1231133201357. The reversal of 1231133201323 is 3231023311321.

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 1231133201323 - 2¹ = 1231133201321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231133201321) 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, 6346047333 + ... + 6346047526.

It is an arithmetic number, because the mean of its divisors is an integer number (310956324070).

Almost surely, 2^{1231133201323} is an apocalyptic number.

1231133201323 is a deficient number, since it is larger than the sum of its proper divisors (12692094957).

1231133201323 is an equidigital number, since it uses as much as digits as its factorization.

1231133201323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12692094956.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1231133201323 its reverse (3231023311321), we get a palindrome (4462156512644).

The spelling of 1231133201323 in words is "one trillion, two hundred thirty-one billion, one hundred thirty-three million, two hundred one thousand, three hundred twenty-three".