1231343330013 has 32 divisors (see below), whose sum is σ = 1958723493120. Its totient is φ = 761725762560.

The previous prime is 1231343330003. The next prime is 1231343330017. The reversal of 1231343330013 is 3100333431321.

1231343330013 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 343 + 3 + 300 + 13 = 666.

It is not a de Polignac number, because 1231343330013 - 2¹³ = 1231343321821 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231343330017) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18859420 + ... + 18924597.

It is an arithmetic number, because the mean of its divisors is an integer number (61210109160).

Almost surely, 2^{1231343330013} is an apocalyptic number.

It is an amenable number.

1231343330013 is a deficient number, since it is larger than the sum of its proper divisors (727380163107).

1231343330013 is a wasteful number, since it uses less digits than its factorization.

1231343330013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37784114 (or 37784108 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 27.

Adding to 1231343330013 its reverse (3100333431321), we get a palindrome (4331676761334).

The spelling of 1231343330013 in words is "one trillion, two hundred thirty-one billion, three hundred forty-three million, three hundred thirty thousand, thirteen".