11111021011012 has 96 divisors (see below), whose sum is σ = 23395711852800. Its totient is φ = 4564785426432.

The previous prime is 11111021011007. The next prime is 11111021011019. The reversal of 11111021011012 is 21011012011111.

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 = 11111021010983 and 11111021011001.

It is not an unprimeable number, because it can be changed into a prime (11111021011019) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1260562 + ... + 4879657.

It is an arithmetic number, because the mean of its divisors is an integer number (243705331800).

Almost surely, 2^{11111021011012} is an apocalyptic number.

It is an amenable number.

11111021011012 is an abundant number, since it is smaller than the sum of its proper divisors (12284690841788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11111021011012 is a wasteful number, since it uses less digits than its factorization.

11111021011012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140365 (or 6140363 counting only the distinct ones).

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

Adding to 11111021011012 its reverse (21011012011111), we get a palindrome (32122033022123).

The spelling of 11111021011012 in words is "eleven trillion, one hundred eleven billion, twenty-one million, eleven thousand, twelve".