689111021012121 has 24 divisors (see below), whose sum is σ = 999881872510976. Its totient is φ = 457330900590720.

The previous prime is 689111021012077. The next prime is 689111021012147. The reversal of 689111021012121 is 121210120111986.

689111021012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 689111021012121 - 2²³ = 689111012623513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689111021012171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50244936 + ... + 62472198.

Almost surely, 2^{689111021012121} is an apocalyptic number.

It is an amenable number.

689111021012121 is a deficient number, since it is larger than the sum of its proper divisors (310770851498855).

689111021012121 is a wasteful number, since it uses less digits than its factorization.

689111021012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12255573 (or 12255570 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 36.

The spelling of 689111021012121 in words is "six hundred eighty-nine trillion, one hundred eleven billion, twenty-one million, twelve thousand, one hundred twenty-one".