20220022021021 has 4 divisors (see below), whose sum is σ = 20270954066812. Its totient is φ = 20169089975232.

The previous prime is 20220022021019. The next prime is 20220022021097. The reversal of 20220022021021 is 12012022002202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14636087609796 + 5583934411225 = 3825714^2 + 2363035^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220022021021 - 2¹ = 20220022021019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20220022020986 and 20220022021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220022021421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25466022300 + ... + 25466023093.

It is an arithmetic number, because the mean of its divisors is an integer number (5067738516703).

Almost surely, 2^{20220022021021} is an apocalyptic number.

It is an amenable number.

20220022021021 is a deficient number, since it is larger than the sum of its proper divisors (50932045791).

20220022021021 is an equidigital number, since it uses as much as digits as its factorization.

20220022021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50932045790.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 20220022021021 its reverse (12012022002202), we get a palindrome (32232044023223).

The spelling of 20220022021021 in words is "twenty trillion, two hundred twenty billion, twenty-two million, twenty-one thousand, twenty-one".