13131312112021 has 16 divisors (see below), whose sum is σ = 13814415433728. Its totient is φ = 12466734433200.

The previous prime is 13131312112013. The next prime is 13131312112081. The reversal of 13131312112021 is 12021121313131.

It is a cyclic number.

It is not a de Polignac number, because 13131312112021 - 2³ = 13131312112013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13131312111983 and 13131312112001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131312112001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18875785 + ... + 19559086.

It is an arithmetic number, because the mean of its divisors is an integer number (863400964608).

Almost surely, 2^{13131312112021} is an apocalyptic number.

It is an amenable number.

13131312112021 is a deficient number, since it is larger than the sum of its proper divisors (683103321707).

13131312112021 is a wasteful number, since it uses less digits than its factorization.

13131312112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38435112.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 13131312112021 its reverse (12021121313131), we get a palindrome (25152433425152).

The spelling of 13131312112021 in words is "thirteen trillion, one hundred thirty-one billion, three hundred twelve million, one hundred twelve thousand, twenty-one".