210001099120 has 20 divisors (see below), whose sum is σ = 488252555640. Its totient is φ = 84000439616.

The previous prime is 210001099081. The next prime is 210001099141. The reversal of 210001099120 is 21990100012.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1312506790 + ... + 1312506949.

It is an arithmetic number, because the mean of its divisors is an integer number (24412627782).

Almost surely, 2^210001099120 is an apocalyptic number.

210001099120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210001099120 is an abundant number, since it is smaller than the sum of its proper divisors (278251456520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210001099120 is a wasteful number, since it uses less digits than its factorization.

210001099120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625013752 (or 2625013746 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

Adding to 210001099120 its reverse (21990100012), we get a palindrome (231991199132).

The spelling of 210001099120 in words is "two hundred ten billion, one million, ninety-nine thousand, one hundred twenty".