1323121310303 has 4 divisors (see below), whose sum is σ = 1424899872648. Its totient is φ = 1221342747960.

The previous prime is 1323121310299. The next prime is 1323121310351. The reversal of 1323121310303 is 3030131213231.

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 1323121310303 - 2² = 1323121310299 is a prime.

It is a super-2 number, since 2×1323121310303² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323121310363) 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, 50889281153 + ... + 50889281178.

It is an arithmetic number, because the mean of its divisors is an integer number (356224968162).

Almost surely, 2^{1323121310303} is an apocalyptic number.

1323121310303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1323121310303 is a deficient number, since it is larger than the sum of its proper divisors (101778562345).

1323121310303 is a wasteful number, since it uses less digits than its factorization.

1323121310303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101778562344.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1323121310303 its reverse (3030131213231), we get a palindrome (4353252523534).

The spelling of 1323121310303 in words is "one trillion, three hundred twenty-three billion, one hundred twenty-one million, three hundred ten thousand, three hundred three".