121158327686 has 16 divisors (see below), whose sum is σ = 198440843328. Its totient is φ = 55021477800.

The previous prime is 121158327677. The next prime is 121158327709. The reversal of 121158327686 is 686723851121.

It is a super-2 number, since 2×121158327686² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2499920 + ... + 2547923.

It is an arithmetic number, because the mean of its divisors is an integer number (12402552708).

Almost surely, 2^121158327686 is an apocalyptic number.

121158327686 is a deficient number, since it is larger than the sum of its proper divisors (77282515642).

121158327686 is a wasteful number, since it uses less digits than its factorization.

121158327686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048947.

The product of its digits is 967680, while the sum is 50.

It can be divided in two parts, 121158 and 327686, that added together give a palindrome (448844).

The spelling of 121158327686 in words is "one hundred twenty-one billion, one hundred fifty-eight million, three hundred twenty-seven thousand, six hundred eighty-six".