201220100087 has 2 divisors, whose sum is σ = 201220100088. Its totient is φ = 201220100086.

The previous prime is 201220100027. The next prime is 201220100129. The reversal of 201220100087 is 780001022102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201220100087 - 2¹⁰ = 201220099063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201220100017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610050043 + 100610050044.

It is an arithmetic number, because the mean of its divisors is an integer number (100610050044).

Almost surely, 2^201220100087 is an apocalyptic number.

201220100087 is a deficient number, since it is larger than the sum of its proper divisors (1).

201220100087 is an equidigital number, since it uses as much as digits as its factorization.

201220100087 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 201220100087 its reverse (780001022102), we get a palindrome (981221122189).

The spelling of 201220100087 in words is "two hundred one billion, two hundred twenty million, one hundred thousand, eighty-seven".