2001220100099 has 4 divisors (see below), whose sum is σ = 2183149200120. Its totient is φ = 1819291000080.

The previous prime is 2001220100059. The next prime is 2001220100119. The reversal of 2001220100099 is 9900010221002.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2001220100099 - 2⁸ = 2001220099843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001220100059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90964549994 + ... + 90964550015.

It is an arithmetic number, because the mean of its divisors is an integer number (545787300030).

Almost surely, 2^{2001220100099} is an apocalyptic number.

2001220100099 is a deficient number, since it is larger than the sum of its proper divisors (181929100021).

2001220100099 is a wasteful number, since it uses less digits than its factorization.

2001220100099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181929100020.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 2001220100099 in words is "two trillion, one billion, two hundred twenty million, one hundred thousand, ninety-nine".