20020100221087 has 2 divisors, whose sum is σ = 20020100221088. Its totient is φ = 20020100221086.

The previous prime is 20020100220973. The next prime is 20020100221133. The reversal of 20020100221087 is 78012200102002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20020100221087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20020100221487) 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, 10010050110543 + 10010050110544.

It is an arithmetic number, because the mean of its divisors is an integer number (10010050110544).

Almost surely, 2^{20020100221087} is an apocalyptic number.

20020100221087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020100221087 is an equidigital number, since it uses as much as digits as its factorization.

20020100221087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 25.

Adding to 20020100221087 its reverse (78012200102002), we get a palindrome (98032300323089).

The spelling of 20020100221087 in words is "twenty trillion, twenty billion, one hundred million, two hundred twenty-one thousand, eighty-seven".