320213023220021 has 16 divisors (see below), whose sum is σ = 342388074622464. Its totient is φ = 298409778580224.

The previous prime is 320213023219979. The next prime is 320213023220023. The reversal of 320213023220021 is 120022320312023.

It is not a de Polignac number, because 320213023220021 - 2¹⁰ = 320213023218997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320213023220023) 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, 72251 + ... + 25306743.

It is an arithmetic number, because the mean of its divisors is an integer number (21399254663904).

Almost surely, 2^{320213023220021} is an apocalyptic number.

It is an amenable number.

320213023220021 is a deficient number, since it is larger than the sum of its proper divisors (22175051402443).

320213023220021 is a wasteful number, since it uses less digits than its factorization.

320213023220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25241860.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 320213023220021 its reverse (120022320312023), we get a palindrome (440235343532044).

The spelling of 320213023220021 in words is "three hundred twenty trillion, two hundred thirteen billion, twenty-three million, two hundred twenty thousand, twenty-one".