2211010101211 has 4 divisors (see below), whose sum is σ = 2242151088624. Its totient is φ = 2179869113800.

The previous prime is 2211010101173. The next prime is 2211010101253. The reversal of 2211010101211 is 1121010101122.

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 2211010101211 - 2²¹ = 2211008004059 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2211010101191 and 2211010101200.

It is not an unprimeable number, because it can be changed into a prime (2211010101511) 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 3 ways as a sum of consecutive naturals, for example, 15570493600 + ... + 15570493741.

It is an arithmetic number, because the mean of its divisors is an integer number (560537772156).

Almost surely, 2^{2211010101211} is an apocalyptic number.

2211010101211 is a deficient number, since it is larger than the sum of its proper divisors (31140987413).

2211010101211 is an equidigital number, since it uses as much as digits as its factorization.

2211010101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31140987412.

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

Adding to 2211010101211 its reverse (1121010101122), we get a palindrome (3332020202333).

The spelling of 2211010101211 in words is "two trillion, two hundred eleven billion, ten million, one hundred one thousand, two hundred eleven".