11311110021 has 24 divisors (see below), whose sum is σ = 16029732384. Its totient is φ = 7093216000.

The previous prime is 11311109989. The next prime is 11311110029. The reversal of 11311110021 is 12001111311.

It is not a de Polignac number, because 11311110021 - 2⁵ = 11311109989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11311109979 and 11311110006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11311110029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2816611 + ... + 2820623.

It is an arithmetic number, because the mean of its divisors is an integer number (667905516).

Almost surely, 2^11311110021 is an apocalyptic number.

It is an amenable number.

11311110021 is a deficient number, since it is larger than the sum of its proper divisors (4718622363).

11311110021 is a wasteful number, since it uses less digits than its factorization.

11311110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7301 (or 7284 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 12.

Adding to 11311110021 its reverse (12001111311), we get a palindrome (23312221332).

The spelling of 11311110021 in words is "eleven billion, three hundred eleven million, one hundred ten thousand, twenty-one".