13021312001231 has 4 divisors (see below), whose sum is σ = 13022003209200. Its totient is φ = 13020620793264.

The previous prime is 13021312001221. The next prime is 13021312001287. The reversal of 13021312001231 is 13210021312031.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13021312001231 is a prime.

It is a super-2 number, since 2×13021312001231² (a number of 27 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 (13021312001221) 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, 345575726 + ... + 345613403.

It is an arithmetic number, because the mean of its divisors is an integer number (3255500802300).

Almost surely, 2^{13021312001231} is an apocalyptic number.

13021312001231 is a deficient number, since it is larger than the sum of its proper divisors (691207969).

13021312001231 is an equidigital number, since it uses as much as digits as its factorization.

13021312001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691207968.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 13021312001231 its reverse (13210021312031), we get a palindrome (26231333313262).

The spelling of 13021312001231 in words is "thirteen trillion, twenty-one billion, three hundred twelve million, one thousand, two hundred thirty-one".