11211111001012 has 24 divisors (see below), whose sum is σ = 21643964769672. Its totient is φ = 5048155046400.

The previous prime is 11211111000967. The next prime is 11211111001049. The reversal of 11211111001012 is 21010011111211.

It can be written as a sum of positive squares in 4 ways, for example, as 395786941456 + 10815324059556 = 629116^2 + 3288666^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 11211111000983 and 11211111001001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2629245289 + ... + 2629249552.

It is an arithmetic number, because the mean of its divisors is an integer number (901831865403).

Almost surely, 2^{11211111001012} is an apocalyptic number.

It is an amenable number.

11211111001012 is a deficient number, since it is larger than the sum of its proper divisors (10432853768660).

11211111001012 is a wasteful number, since it uses less digits than its factorization.

11211111001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5258494899 (or 5258494897 counting only the distinct ones).

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

Adding to 11211111001012 its reverse (21010011111211), we get a palindrome (32221122112223).

The spelling of 11211111001012 in words is "eleven trillion, two hundred eleven billion, one hundred eleven million, one thousand, twelve".