12011220011 has 24 divisors (see below), whose sum is σ = 14713633440. Its totient is φ = 9757262592.

The previous prime is 12011219989. The next prime is 12011220017. The reversal of 12011220011 is 11002211021.

It is not a de Polignac number, because 12011220011 - 2¹⁴ = 12011203627 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011219974 and 12011220001.

It is not an unprimeable number, because it can be changed into a prime (12011220017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73955 + ... + 171731.

It is an arithmetic number, because the mean of its divisors is an integer number (613068060).

Almost surely, 2^12011220011 is an apocalyptic number.

12011220011 is a deficient number, since it is larger than the sum of its proper divisors (2702413429).

12011220011 is a wasteful number, since it uses less digits than its factorization.

12011220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97923 (or 97916 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12011220011 its reverse (11002211021), we get a palindrome (23013431032).

The spelling of 12011220011 in words is "twelve billion, eleven million, two hundred twenty thousand, eleven".