20320021122021 has 12 divisors (see below), whose sum is σ = 29832307877580. Its totient is φ = 13324604014080.

The previous prime is 20320021121971. The next prime is 20320021122031. The reversal of 20320021122021 is 12022112002302.

20320021122021 is a `hidden beast` number, since 203 + 200 + 21 + 1 + 220 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9841114073025 + 10478907048996 = 3137055^2 + 3237114^2 .

It is not a de Polignac number, because 20320021122021 - 2⁶ = 20320021121957 is a prime.

It is a super-2 number, since 2×20320021122021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20320021121985 and 20320021122003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320021122031) 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, 18506393916 + ... + 18506395013.

It is an arithmetic number, because the mean of its divisors is an integer number (2486025656465).

Almost surely, 2^{20320021122021} is an apocalyptic number.

It is an amenable number.

20320021122021 is a deficient number, since it is larger than the sum of its proper divisors (9512286755559).

20320021122021 is a wasteful number, since it uses less digits than its factorization.

20320021122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37012788996 (or 37012788993 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20320021122021 its reverse (12022112002302), we get a palindrome (32342133124323).

The spelling of 20320021122021 in words is "twenty trillion, three hundred twenty billion, twenty-one million, one hundred twenty-two thousand, twenty-one".