1211110011211 has 16 divisors (see below), whose sum is σ = 1304628768000. Its totient is φ = 1120759612128.

The previous prime is 1211110011197. The next prime is 1211110011229. The reversal of 1211110011211 is 1121100111121.

It is not a de Polignac number, because 1211110011211 - 2¹⁷ = 1211109880139 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211110011191 and 1211110011200.

It is not an unprimeable number, because it can be changed into a prime (1211110011271) 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, 2420511 + ... + 2877688.

It is an arithmetic number, because the mean of its divisors is an integer number (81539298000).

Almost surely, 2^{1211110011211} is an apocalyptic number.

1211110011211 is a deficient number, since it is larger than the sum of its proper divisors (93518756789).

1211110011211 is a wasteful number, since it uses less digits than its factorization.

1211110011211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5298498.

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

Adding to 1211110011211 its reverse (1121100111121), we get a palindrome (2332210122332).

The spelling of 1211110011211 in words is "one trillion, two hundred eleven billion, one hundred ten million, eleven thousand, two hundred eleven".