1331011201323 has 4 divisors (see below), whose sum is σ = 1774681601768. Its totient is φ = 887340800880.

The previous prime is 1331011201321. The next prime is 1331011201379. The reversal of 1331011201323 is 3231021101331.

It is a happy number.

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

It is not a de Polignac number, because 1331011201323 - 2¹ = 1331011201321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1331011201323.

It is not an unprimeable number, because it can be changed into a prime (1331011201321) 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, 221835200218 + ... + 221835200223.

It is an arithmetic number, because the mean of its divisors is an integer number (443670400442).

Almost surely, 2^{1331011201323} is an apocalyptic number.

1331011201323 is a deficient number, since it is larger than the sum of its proper divisors (443670400445).

1331011201323 is an equidigital number, since it uses as much as digits as its factorization.

1331011201323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443670400444.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1331011201323 its reverse (3231021101331), we get a palindrome (4562032302654).

The spelling of 1331011201323 in words is "one trillion, three hundred thirty-one billion, eleven million, two hundred one thousand, three hundred twenty-three".