68107121 has 4 divisors (see below), whose sum is σ = 69947892. Its totient is φ = 66266352.

The previous prime is 68107111. The next prime is 68107129. The reversal of 68107121 is 12170186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30958096 + 37149025 = 5564^2 + 6095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68107121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68107129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920330 + ... + 920403.

It is an arithmetic number, because the mean of its divisors is an integer number (17486973).

Almost surely, 2^68107121 is an apocalyptic number.

It is an amenable number.

68107121 is a deficient number, since it is larger than the sum of its proper divisors (1840771).

68107121 is a wasteful number, since it uses less digits than its factorization.

68107121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840770.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 68107121 is about 8252.7038599480. The cubic root of 68107121 is about 408.3797266553.

It can be divided in two parts, 6810 and 7121, that added together give a palindrome (13931).

The spelling of 68107121 in words is "sixty-eight million, one hundred seven thousand, one hundred twenty-one".