68210121 has 16 divisors (see below), whose sum is σ = 104582144. Its totient is φ = 38736144.

The previous prime is 68210081. The next prime is 68210123. The reversal of 68210121 is 12101286.

It is not a de Polignac number, because 68210121 - 2¹⁴ = 68193737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68210123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6541 + ... + 13386.

It is an arithmetic number, because the mean of its divisors is an integer number (6536384).

Almost surely, 2^68210121 is an apocalyptic number.

It is an amenable number.

68210121 is a deficient number, since it is larger than the sum of its proper divisors (36372023).

68210121 is a wasteful number, since it uses less digits than its factorization.

68210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20100.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 68210121 is about 8258.9418813792. The cubic root of 68210121 is about 408.5854903830.

The spelling of 68210121 in words is "sixty-eight million, two hundred ten thousand, one hundred twenty-one".