13121213311 has 4 divisors (see below), whose sum is σ = 13121506192. Its totient is φ = 13120920432.

The previous prime is 13121213293. The next prime is 13121213317. The reversal of 13121213311 is 11331212131.

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-13121213311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121213317) 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, 63630 + ... + 174043.

It is an arithmetic number, because the mean of its divisors is an integer number (3280376548).

Almost surely, 2^13121213311 is an apocalyptic number.

13121213311 is a deficient number, since it is larger than the sum of its proper divisors (292881).

13121213311 is an equidigital number, since it uses as much as digits as its factorization.

13121213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292880.

The product of its digits is 108, while the sum is 19.

Adding to 13121213311 its reverse (11331212131), we get a palindrome (24452425442).

The spelling of 13121213311 in words is "thirteen billion, one hundred twenty-one million, two hundred thirteen thousand, three hundred eleven".