1210101220209 has 16 divisors (see below), whose sum is σ = 1844048981888. Its totient is φ = 691454454912.

The previous prime is 1210101220199. The next prime is 1210101220241. The reversal of 1210101220209 is 9020221010121.

It is not a de Polignac number, because 1210101220209 - 2⁵ = 1210101220177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210101228209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862462 + ... + 1778775.

It is an arithmetic number, because the mean of its divisors is an integer number (115253061368).

Almost surely, 2^{1210101220209} is an apocalyptic number.

It is an amenable number.

1210101220209 is a deficient number, since it is larger than the sum of its proper divisors (633947761679).

1210101220209 is a wasteful number, since it uses less digits than its factorization.

1210101220209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663064.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 1210101220209 in words is "one trillion, two hundred ten billion, one hundred one million, two hundred twenty thousand, two hundred nine".