13111211231209 has 16 divisors (see below), whose sum is σ = 16986184593280. Its totient is φ = 9827721083520.

The previous prime is 13111211231159. The next prime is 13111211231231. The reversal of 13111211231209 is 90213211211131.

It is not a de Polignac number, because 13111211231209 - 2¹⁵ = 13111211198441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13111211231269) 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, 3791557332 + ... + 3791560789.

It is an arithmetic number, because the mean of its divisors is an integer number (1061636537080).

Almost surely, 2^{13111211231209} is an apocalyptic number.

13111211231209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13111211231209 is a deficient number, since it is larger than the sum of its proper divisors (3874973362071).

13111211231209 is a wasteful number, since it uses less digits than its factorization.

13111211231209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7583118160.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 13111211231209 in words is "thirteen trillion, one hundred eleven billion, two hundred eleven million, two hundred thirty-one thousand, two hundred nine".