11500111021 has 8 divisors (see below), whose sum is σ = 13714418304. Its totient is φ = 9428662320.

The previous prime is 11500111009. The next prime is 11500111061. The reversal of 11500111021 is 12011100511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11500111021 - 2⁷ = 11500110893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11500110992 and 11500111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11500111061) 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 7 ways as a sum of consecutive naturals, for example, 35714470 + ... + 35714791.

It is an arithmetic number, because the mean of its divisors is an integer number (1714302288).

Almost surely, 2^11500111021 is an apocalyptic number.

It is an amenable number.

11500111021 is a deficient number, since it is larger than the sum of its proper divisors (2214307283).

11500111021 is an equidigital number, since it uses as much as digits as its factorization.

11500111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71429291.

The product of its (nonzero) digits is 10, while the sum is 13.

Adding to 11500111021 its reverse (12011100511), we get a palindrome (23511211532).

The spelling of 11500111021 in words is "eleven billion, five hundred million, one hundred eleven thousand, twenty-one".