1211102100211 has 4 divisors (see below), whose sum is σ = 1211182283592. Its totient is φ = 1211021916832.

The previous prime is 1211102100199. The next prime is 1211102100269. The reversal of 1211102100211 is 1120012011121.

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 1211102100211 - 2⁵ = 1211102100179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211102100191 and 1211102100200.

It is not an unprimeable number, because it can be changed into a prime (1211102100911) 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, 40069030 + ... + 40099243.

It is an arithmetic number, because the mean of its divisors is an integer number (302795570898).

Almost surely, 2^{1211102100211} is an apocalyptic number.

1211102100211 is a deficient number, since it is larger than the sum of its proper divisors (80183381).

1211102100211 is an equidigital number, since it uses as much as digits as its factorization.

1211102100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80183380.

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

Adding to 1211102100211 its reverse (1120012011121), we get a palindrome (2331114111332).

The spelling of 1211102100211 in words is "one trillion, two hundred eleven billion, one hundred two million, one hundred thousand, two hundred eleven".