320121203013 has 12 divisors (see below), whose sum is σ = 463769396428. Its totient is φ = 212780856960.

The previous prime is 320121203009. The next prime is 320121203053. The reversal of 320121203013 is 310302121023.

320121203013 is a `hidden beast` number, since 320 + 1 + 21 + 20 + 301 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 159706534689 + 160414668324 = 399633^2 + 400518^2 .

It is not a de Polignac number, because 320121203013 - 2² = 320121203009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320121203053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52769998 + ... + 52776063.

Almost surely, 2^320121203013 is an apocalyptic number.

It is an amenable number.

320121203013 is a deficient number, since it is larger than the sum of its proper divisors (143648193415).

320121203013 is a wasteful number, since it uses less digits than its factorization.

320121203013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105546404 (or 105546401 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 320121203013 its reverse (310302121023), we get a palindrome (630423324036).

The spelling of 320121203013 in words is "three hundred twenty billion, one hundred twenty-one million, two hundred three thousand, thirteen".