11979097911 has 32 divisors (see below), whose sum is σ = 19883424000. Its totient is φ = 7063835040.

The previous prime is 11979097909. The next prime is 11979097937.

11979097911 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 11979097911 - 2¹ = 11979097909 is a prime.

It is a super-2 number, since 2×11979097911² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11979097901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 534061 + ... + 556038.

It is an arithmetic number, because the mean of its divisors is an integer number (621357000).

Almost surely, 2^11979097911 is an apocalyptic number.

11979097911 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11979097911 is a deficient number, since it is larger than the sum of its proper divisors (7904326089).

11979097911 is a wasteful number, since it uses less digits than its factorization.

11979097911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090156 (or 1090150 counting only the distinct ones).

The product of its (nonzero) digits is 321489, while the sum is 54.

The spelling of 11979097911 in words is "eleven billion, nine hundred seventy-nine million, ninety-seven thousand, nine hundred eleven".