11100021021 has 24 divisors (see below), whose sum is σ = 17007666624. Its totient is φ = 6951934080.

The previous prime is 11100021013. The next prime is 11100021029. The reversal of 11100021021 is 12012000111.

It is a happy number.

11100021021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11100021013) and next prime (11100021029).

It is not a de Polignac number, because 11100021021 - 2³ = 11100021013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 11100020994 and 11100021012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100021029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17376 + ... + 150006.

It is an arithmetic number, because the mean of its divisors is an integer number (708652776).

Almost surely, 2^11100021021 is an apocalyptic number.

It is an amenable number.

11100021021 is a deficient number, since it is larger than the sum of its proper divisors (5907645603).

11100021021 is a wasteful number, since it uses less digits than its factorization.

11100021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133201 (or 133198 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 11100021021 its reverse (12012000111), we get a palindrome (23112021132).

The spelling of 11100021021 in words is "eleven billion, one hundred million, twenty-one thousand, twenty-one".