1211011110211 has 16 divisors (see below), whose sum is σ = 1407311801280. Its totient is φ = 1020549962880.

The previous prime is 1211011110193. The next prime is 1211011110247. The reversal of 1211011110211 is 1120111101121.

It is not a de Polignac number, because 1211011110211 - 2²¹ = 1211009013059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211011110191 and 1211011110200.

It is not an unprimeable number, because it can be changed into a prime (1211011110251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371805 + ... + 1600081.

It is an arithmetic number, because the mean of its divisors is an integer number (87956987580).

Almost surely, 2^{1211011110211} is an apocalyptic number.

1211011110211 is a deficient number, since it is larger than the sum of its proper divisors (196300691069).

1211011110211 is a wasteful number, since it uses less digits than its factorization.

1211011110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230654.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 1211011110211 its reverse (1120111101121), we get a palindrome (2331122211332).

The spelling of 1211011110211 in words is "one trillion, two hundred eleven billion, eleven million, one hundred ten thousand, two hundred eleven".