1210211100211 has 4 divisors (see below), whose sum is σ = 1210215657024. Its totient is φ = 1210206543400.

The previous prime is 1210211100209. The next prime is 1210211100239. The reversal of 1210211100211 is 1120011120121.

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 1210211100211 - 2¹ = 1210211100209 is a prime.

It is a super-2 number, since 2×1210211100211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210211100191 and 1210211100200.

It is not an unprimeable number, because it can be changed into a prime (1210211100011) 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, 1853635 + ... + 2419996.

It is an arithmetic number, because the mean of its divisors is an integer number (302553914256).

Almost surely, 2^{1210211100211} is an apocalyptic number.

1210211100211 is a deficient number, since it is larger than the sum of its proper divisors (4556813).

1210211100211 is an equidigital number, since it uses as much as digits as its factorization.

1210211100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556812.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1210211100211 its reverse (1120011120121), we get a palindrome (2330222220332).

The spelling of 1210211100211 in words is "one trillion, two hundred ten billion, two hundred eleven million, one hundred thousand, two hundred eleven".