320121300021 has 8 divisors (see below), whose sum is σ = 426858034944. Its totient is φ = 213399382560.

The previous prime is 320121300013. The next prime is 320121300041. The reversal of 320121300021 is 120003121023.

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

It is not a de Polignac number, because 320121300021 - 2³ = 320121300013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320121300041) 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, 3653856 + ... + 3740441.

It is an arithmetic number, because the mean of its divisors is an integer number (53357254368).

Almost surely, 2^320121300021 is an apocalyptic number.

It is an amenable number.

320121300021 is a deficient number, since it is larger than the sum of its proper divisors (106736734923).

320121300021 is a wasteful number, since it uses less digits than its factorization.

320121300021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408731.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 320121300021 its reverse (120003121023), we get a palindrome (440124421044).

The spelling of 320121300021 in words is "three hundred twenty billion, one hundred twenty-one million, three hundred thousand, twenty-one".