13111031311209 has 48 divisors (see below), whose sum is σ = 21158475566592. Its totient is φ = 8065210341888.

The previous prime is 13111031311187. The next prime is 13111031311211. The reversal of 13111031311209 is 90211313011131.

13111031311209 is a `hidden beast` number, since 1 + 3 + 1 + 110 + 31 + 311 + 209 = 666.

It is not a de Polignac number, because 13111031311209 - 2²⁰ = 13111030262633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13111031311249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7390984 + ... + 8991590.

It is an arithmetic number, because the mean of its divisors is an integer number (440801574304).

Almost surely, 2^{13111031311209} is an apocalyptic number.

It is an amenable number.

13111031311209 is a deficient number, since it is larger than the sum of its proper divisors (8047444255383).

13111031311209 is a wasteful number, since it uses less digits than its factorization.

13111031311209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1603228 (or 1603216 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The spelling of 13111031311209 in words is "thirteen trillion, one hundred eleven billion, thirty-one million, three hundred eleven thousand, two hundred nine".