320020121 has 8 divisors (see below), whose sum is σ = 339006024. Its totient is φ = 301052160.

The previous prime is 320020111. The next prime is 320020123. The reversal of 320020121 is 121020023.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 160376896 + 159643225 = 12664^2 + 12635^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 320020121 - 2²² = 315825817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320020123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54551 + ... + 60131.

It is an arithmetic number, because the mean of its divisors is an integer number (42375753).

Almost surely, 2^320020121 is an apocalyptic number.

It is an amenable number.

320020121 is a deficient number, since it is larger than the sum of its proper divisors (18985903).

320020121 is a wasteful number, since it uses less digits than its factorization.

320020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 320020121 is about 17889.1062102051. The cubic root of 320020121 is about 684.0047143811.

Adding to 320020121 its reverse (121020023), we get a palindrome (441040144).

The spelling of 320020121 in words is "three hundred twenty million, twenty thousand, one hundred twenty-one".