13121203311 has 16 divisors (see below), whose sum is σ = 19440645120. Its totient is φ = 8746647480.

The previous prime is 13121203301. The next prime is 13121203357. The reversal of 13121203311 is 11330212131.

13121203311 is a `hidden beast` number, since 1 + 312 + 1 + 20 + 331 + 1 = 666.

It is not a de Polignac number, because 13121203311 - 2¹⁰ = 13121202287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121203301) 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, 442786 + ... + 471488.

It is an arithmetic number, because the mean of its divisors is an integer number (1215040320).

Almost surely, 2^13121203311 is an apocalyptic number.

13121203311 is a deficient number, since it is larger than the sum of its proper divisors (6319441809).

13121203311 is a wasteful number, since it uses less digits than its factorization.

13121203311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45643 (or 45637 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 13121203311 its reverse (11330212131), we get a palindrome (24451415442).

The spelling of 13121203311 in words is "thirteen billion, one hundred twenty-one million, two hundred three thousand, three hundred eleven".