11807378121 has 64 divisors (see below), whose sum is σ = 19824537600. Its totient is φ = 6072572160.

The previous prime is 11807378119. The next prime is 11807378123. The reversal of 11807378121 is 12187370811.

It is an interprime number because it is at equal distance from previous prime (11807378119) and next prime (11807378123).

It is not a de Polignac number, because 11807378121 - 2¹ = 11807378119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11807378121.

It is not an unprimeable number, because it can be changed into a prime (11807378123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13462935 + ... + 13463811.

It is an arithmetic number, because the mean of its divisors is an integer number (309758400).

Almost surely, 2^11807378121 is an apocalyptic number.

11807378121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11807378121 is a deficient number, since it is larger than the sum of its proper divisors (8017159479).

11807378121 is a wasteful number, since it uses less digits than its factorization.

11807378121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1414.

The product of its (nonzero) digits is 18816, while the sum is 39.

The spelling of 11807378121 in words is "eleven billion, eight hundred seven million, three hundred seventy-eight thousand, one hundred twenty-one".