13231312202111 has 4 divisors (see below), whose sum is σ = 13231330061832. Its totient is φ = 13231294342392.

The previous prime is 13231312202099. The next prime is 13231312202113. The reversal of 13231312202111 is 11120221313231.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13231312202111 - 2³⁰ = 13230238460287 is a prime.

It is a super-2 number, since 2×13231312202111² (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 (13231312202113) 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, 7768220 + ... + 9317073.

It is an arithmetic number, because the mean of its divisors is an integer number (3307832515458).

Almost surely, 2^{13231312202111} is an apocalyptic number.

13231312202111 is a deficient number, since it is larger than the sum of its proper divisors (17859721).

13231312202111 is an equidigital number, since it uses as much as digits as its factorization.

13231312202111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17859720.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 13231312202111 its reverse (11120221313231), we get a palindrome (24351533515342).

The spelling of 13231312202111 in words is "thirteen trillion, two hundred thirty-one billion, three hundred twelve million, two hundred two thousand, one hundred eleven".