320002131021 has 16 divisors (see below), whose sum is σ = 435972746304. Its totient is φ = 208706336384.

The previous prime is 320002130969. The next prime is 320002131023. The reversal of 320002131021 is 120131200023.

It is a cyclic number.

It is not a de Polignac number, because 320002131021 - 2¹¹ = 320002128973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320002131023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2844816 + ... + 2955161.

It is an arithmetic number, because the mean of its divisors is an integer number (27248296644).

Almost surely, 2^320002131021 is an apocalyptic number.

It is an amenable number.

320002131021 is a deficient number, since it is larger than the sum of its proper divisors (115970615283).

320002131021 is a wasteful number, since it uses less digits than its factorization.

320002131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5800380.

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

Adding to 320002131021 its reverse (120131200023), we get a palindrome (440133331044).

The spelling of 320002131021 in words is "three hundred twenty billion, two million, one hundred thirty-one thousand, twenty-one".