689111021012122 has 16 divisors (see below), whose sum is σ = 1070119675391400. Its totient is φ = 332422450778880.

The previous prime is 689111021012077. The next prime is 689111021012147. The reversal of 689111021012122 is 221210120111986.

It is a happy number.

689111021012122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 685490787970641 + 3620233041481 = 26181879^2 + 1902691^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4496980347 + ... + 4497133582.

Almost surely, 2^{689111021012122} is an apocalyptic number.

689111021012122 is a deficient number, since it is larger than the sum of its proper divisors (381008654379278).

689111021012122 is a wasteful number, since it uses less digits than its factorization.

689111021012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8994115281.

The product of its (nonzero) digits is 6912, while the sum is 37.

The spelling of 689111021012122 in words is "six hundred eighty-nine trillion, one hundred eleven billion, twenty-one million, twelve thousand, one hundred twenty-two".