68022120021 has 8 divisors (see below), whose sum is σ = 90716063424. Its totient is φ = 45338128320.

The previous prime is 68022120013. The next prime is 68022120071. The reversal of 68022120021 is 12002122086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68022120021 - 2³ = 68022120013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68022119973 and 68022120000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68022120071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2471961 + ... + 2499326.

It is an arithmetic number, because the mean of its divisors is an integer number (11339507928).

Almost surely, 2^68022120021 is an apocalyptic number.

It is an amenable number.

68022120021 is a deficient number, since it is larger than the sum of its proper divisors (22693943403).

68022120021 is a wasteful number, since it uses less digits than its factorization.

68022120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975851.

The product of its (nonzero) digits is 768, while the sum is 24.

The spelling of 68022120021 in words is "sixty-eight billion, twenty-two million, one hundred twenty thousand, twenty-one".