20003221038061 has 2 divisors, whose sum is σ = 20003221038062. Its totient is φ = 20003221038060.

The previous prime is 20003221038043. The next prime is 20003221038089. The reversal of 20003221038061 is 16083012230002.

It is an a-pointer prime, because the next prime (20003221038089) can be obtained adding 20003221038061 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12475688024836 + 7527533013225 = 3532094^2 + 2743635^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003221038061 - 2¹¹ = 20003221036013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003221038011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001610519030 + 10001610519031.

It is an arithmetic number, because the mean of its divisors is an integer number (10001610519031).

Almost surely, 2^{20003221038061} is an apocalyptic number.

It is an amenable number.

20003221038061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003221038061 is an equidigital number, since it uses as much as digits as its factorization.

20003221038061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 20003221038061 its reverse (16083012230002), we get a palindrome (36086233268063).

The spelling of 20003221038061 in words is "twenty trillion, three billion, two hundred twenty-one million, thirty-eight thousand, sixty-one".