20103022021021 has 2 divisors, whose sum is σ = 20103022021022. Its totient is φ = 20103022021020.

The previous prime is 20103022021007. The next prime is 20103022021063. The reversal of 20103022021021 is 12012022030102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11870684688996 + 8232337332025 = 3445386^2 + 2869205^2 .

It is a cyclic number.

It is not a de Polignac number, because 20103022021021 - 2¹⁵ = 20103021988253 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20103022020986 and 20103022021004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20103022028021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051511010510 + 10051511010511.

It is an arithmetic number, because the mean of its divisors is an integer number (10051511010511).

Almost surely, 2^{20103022021021} is an apocalyptic number.

It is an amenable number.

20103022021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

20103022021021 is an equidigital number, since it uses as much as digits as its factorization.

20103022021021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20103022021021 its reverse (12012022030102), we get a palindrome (32115044051123).

The spelling of 20103022021021 in words is "twenty trillion, one hundred three billion, twenty-two million, twenty-one thousand, twenty-one".