210899404401 has 16 divisors (see below), whose sum is σ = 325772859264. Its totient is φ = 118863068544.

The previous prime is 210899404349. The next prime is 210899404409. The reversal of 210899404401 is 104404998012.

It is a happy number.

It is not a de Polignac number, because 210899404401 - 2¹¹ = 210899402353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210899404409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68784966 + ... + 68788031.

It is an arithmetic number, because the mean of its divisors is an integer number (20360803704).

Almost surely, 2^210899404401 is an apocalyptic number.

210899404401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210899404401 is a deficient number, since it is larger than the sum of its proper divisors (114873454863).

210899404401 is a wasteful number, since it uses less digits than its factorization.

210899404401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137573080.

The product of its (nonzero) digits is 82944, while the sum is 42.

The spelling of 210899404401 in words is "two hundred ten billion, eight hundred ninety-nine million, four hundred four thousand, four hundred one".