1231230321321 has 192 divisors, whose sum is σ = 2361013616640. Its totient is φ = 553760064000.

The previous prime is 1231230321313. The next prime is 1231230321337.

1231230321321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1231230321321 - 2³ = 1231230321313 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1231230321291 and 1231230321300.

It is not an unprimeable number, because it can be changed into a prime (1231230321121) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 63380616 + ... + 63400038.

It is an arithmetic number, because the mean of its divisors is an integer number (12296945920).

Almost surely, 2^{1231230321321} is an apocalyptic number.

1231230321321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1231230321321 is a deficient number, since it is larger than the sum of its proper divisors (1129783295319).

1231230321321 is a wasteful number, since it uses less digits than its factorization.

1231230321321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19588 (or 19577 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

It can be divided in two parts, 1231230 and 321321, that added together give a palindrome (1552551).

The spelling of 1231230321321 in words is "one trillion, two hundred thirty-one billion, two hundred thirty million, three hundred twenty-one thousand, three hundred twenty-one".