210220100087 has 2 divisors, whose sum is σ = 210220100088. Its totient is φ = 210220100086.

The previous prime is 210220100021. The next prime is 210220100137. The reversal of 210220100087 is 780001022012.

210220100087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210220100087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220100017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110050043 + 105110050044.

It is an arithmetic number, because the mean of its divisors is an integer number (105110050044).

Almost surely, 2^210220100087 is an apocalyptic number.

210220100087 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220100087 is an equidigital number, since it uses as much as digits as its factorization.

210220100087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 210220100087 its reverse (780001022012), we get a palindrome (990221122099).

The spelling of 210220100087 in words is "two hundred ten billion, two hundred twenty million, one hundred thousand, eighty-seven".