1303123031221 has 4 divisors (see below), whose sum is σ = 1421588761344. Its totient is φ = 1184657301100.

The previous prime is 1303123031213. The next prime is 1303123031257. The reversal of 1303123031221 is 1221303213031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1303123031221 - 2³ = 1303123031213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1303123031192 and 1303123031201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303123031261) 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, 59232865045 + ... + 59232865066.

It is an arithmetic number, because the mean of its divisors is an integer number (355397190336).

Almost surely, 2^{1303123031221} is an apocalyptic number.

1303123031221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1303123031221 is a deficient number, since it is larger than the sum of its proper divisors (118465730123).

1303123031221 is a wasteful number, since it uses less digits than its factorization.

1303123031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118465730122.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1303123031221 its reverse (1221303213031), we get a palindrome (2524426244252).

The spelling of 1303123031221 in words is "one trillion, three hundred three billion, one hundred twenty-three million, thirty-one thousand, two hundred twenty-one".