1303121213231 has 4 divisors (see below), whose sum is σ = 1308312931464. Its totient is φ = 1297929495000.

The previous prime is 1303121213197. The next prime is 1303121213257. The reversal of 1303121213231 is 1323121213031.

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 1303121213231 - 2²⁶ = 1303054104367 is a prime.

It is a super-2 number, since 2×1303121213231² (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 = 1303121213197 and 1303121213206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303121216231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2595858740 + ... + 2595859241.

It is an arithmetic number, because the mean of its divisors is an integer number (327078232866).

Almost surely, 2^{1303121213231} is an apocalyptic number.

1303121213231 is a deficient number, since it is larger than the sum of its proper divisors (5191718233).

1303121213231 is an equidigital number, since it uses as much as digits as its factorization.

1303121213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5191718232.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1303121213231 its reverse (1323121213031), we get a palindrome (2626242426262).

The spelling of 1303121213231 in words is "one trillion, three hundred three billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred thirty-one".