11121111002021 has 32 divisors (see below), whose sum is σ = 11517754652928. Its totient is φ = 10732998182400.

The previous prime is 11121111002003. The next prime is 11121111002047. The reversal of 11121111002021 is 12020011112111.

It is a cyclic number.

It is not a de Polignac number, because 11121111002021 - 2¹⁰ = 11121111000997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121111001987 and 11121111002005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121191002021) 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, 591759401 + ... + 591778193.

It is an arithmetic number, because the mean of its divisors is an integer number (359929832904).

Almost surely, 2^{11121111002021} is an apocalyptic number.

It is an amenable number.

11121111002021 is a deficient number, since it is larger than the sum of its proper divisors (396643650907).

11121111002021 is a wasteful number, since it uses less digits than its factorization.

11121111002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19661.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11121111002021 its reverse (12020011112111), we get a palindrome (23141122114132).

The spelling of 11121111002021 in words is "eleven trillion, one hundred twenty-one billion, one hundred eleven million, two thousand, twenty-one".