20003221032061 has 2 divisors, whose sum is σ = 20003221032062. Its totient is φ = 20003221032060.

The previous prime is 20003221032029. The next prime is 20003221032103. The reversal of 20003221032061 is 16023012230002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18080822144025 + 1922398888036 = 4252155^2 + 1386506^2 .

It is a cyclic number.

It is not a de Polignac number, because 20003221032061 - 2⁵ = 20003221032029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20003221038061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001610516030 + 10001610516031.

It is an arithmetic number, because the mean of its divisors is an integer number (10001610516031).

Almost surely, 2^{20003221032061} is an apocalyptic number.

It is an amenable number.

20003221032061 is a deficient number, since it is larger than the sum of its proper divisors (1).

20003221032061 is an equidigital number, since it uses as much as digits as its factorization.

20003221032061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20003221032061 its reverse (16023012230002), we get a palindrome (36026233262063).

The spelling of 20003221032061 in words is "twenty trillion, three billion, two hundred twenty-one million, thirty-two thousand, sixty-one".