2001220102087 has 2 divisors, whose sum is σ = 2001220102088. Its totient is φ = 2001220102086.

The previous prime is 2001220102009. The next prime is 2001220102171. The reversal of 2001220102087 is 7802010221002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001220102087 - 2³⁵ = 1966860363719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001220103087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610051043 + 1000610051044.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610051044).

Almost surely, 2^{2001220102087} is an apocalyptic number.

2001220102087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220102087 is an equidigital number, since it uses as much as digits as its factorization.

2001220102087 is an evil number, because the sum of its binary digits is even.

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

Adding to 2001220102087 its reverse (7802010221002), we get a palindrome (9803230323089).

The spelling of 2001220102087 in words is "two trillion, one billion, two hundred twenty million, one hundred two thousand, eighty-seven".