12131212321101 has 16 divisors (see below), whose sum is σ = 16612239720384. Its totient is φ = 7868833300224.

The previous prime is 12131212321099. The next prime is 12131212321177. The reversal of 12131212321101 is 10112321213121.

It is not a de Polignac number, because 12131212321101 - 2¹ = 12131212321099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131212321301) 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, 17192485 + ... + 17884181.

It is an arithmetic number, because the mean of its divisors is an integer number (1038264982524).

Almost surely, 2^{12131212321101} is an apocalyptic number.

It is an amenable number.

12131212321101 is a deficient number, since it is larger than the sum of its proper divisors (4481027399283).

12131212321101 is a wasteful number, since it uses less digits than its factorization.

12131212321101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849740.

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 12131212321101 its reverse (10112321213121), we get a palindrome (22243533534222).

The spelling of 12131212321101 in words is "twelve trillion, one hundred thirty-one billion, two hundred twelve million, three hundred twenty-one thousand, one hundred one".