20201003220121 has 2 divisors, whose sum is σ = 20201003220122. Its totient is φ = 20201003220120.

The previous prime is 20201003220077. The next prime is 20201003220137. The reversal of 20201003220121 is 12102230010202.

It is a happy number.

It is an a-pointer prime, because the next prime (20201003220137) can be obtained adding 20201003220121 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15967536483600 + 4233466736521 = 3995940^2 + 2057539^2 .

It is a cyclic number.

It is not a de Polignac number, because 20201003220121 - 2⁹ = 20201003219609 is a prime.

It is a super-2 number, since 2×20201003220121² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20201003220095 and 20201003220104.

It is not a weakly prime, because it can be changed into another prime (20201003220161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100501610060 + 10100501610061.

It is an arithmetic number, because the mean of its divisors is an integer number (10100501610061).

Almost surely, 2^{20201003220121} is an apocalyptic number.

It is an amenable number.

20201003220121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201003220121 is an equidigital number, since it uses as much as digits as its factorization.

20201003220121 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 20201003220121 its reverse (12102230010202), we get a palindrome (32303233230323).

The spelling of 20201003220121 in words is "twenty trillion, two hundred one billion, three million, two hundred twenty thousand, one hundred twenty-one".