2001220099187 has 2 divisors, whose sum is σ = 2001220099188. Its totient is φ = 2001220099186.

The previous prime is 2001220099163. The next prime is 2001220099261. The reversal of 2001220099187 is 7819900221002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001220099187 - 2¹⁴ = 2001220082803 is a prime.

It is a super-2 number, since 2×2001220099187² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2001220099117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000610049593 + 1000610049594.

It is an arithmetic number, because the mean of its divisors is an integer number (1000610049594).

Almost surely, 2^{2001220099187} is an apocalyptic number.

2001220099187 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001220099187 is an equidigital number, since it uses as much as digits as its factorization.

2001220099187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The spelling of 2001220099187 in words is "two trillion, one billion, two hundred twenty million, ninety-nine thousand, one hundred eighty-seven".