1323111120231 has 4 divisors (see below), whose sum is σ = 1764148160312. Its totient is φ = 882074080152.

The previous prime is 1323111120217. The next prime is 1323111120251. The reversal of 1323111120231 is 1320211113231.

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

It is not a de Polignac number, because 1323111120231 - 2⁶ = 1323111120167 is a prime.

It is a super-2 number, since 2×1323111120231² (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 = 1323111120198 and 1323111120207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323111120251) 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, 220518520036 + ... + 220518520041.

It is an arithmetic number, because the mean of its divisors is an integer number (441037040078).

Almost surely, 2^{1323111120231} is an apocalyptic number.

1323111120231 is a deficient number, since it is larger than the sum of its proper divisors (441037040081).

1323111120231 is an equidigital number, since it uses as much as digits as its factorization.

1323111120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441037040080.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1323111120231 its reverse (1320211113231), we get a palindrome (2643322233462).

The spelling of 1323111120231 in words is "one trillion, three hundred twenty-three billion, one hundred eleven million, one hundred twenty thousand, two hundred thirty-one".