11021110021 has 16 divisors (see below), whose sum is σ = 11185895664. Its totient is φ = 10857959424.

The previous prime is 11021110019. The next prime is 11021110109. The reversal of 11021110021 is 12001112011.

It can be written as a sum of positive squares in 8 ways, for example, as 3776717025 + 7244392996 = 61455^2 + 85114^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021110021 - 2¹ = 11021110019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021110621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16877331 + ... + 16877983.

It is an arithmetic number, because the mean of its divisors is an integer number (699118479).

Almost surely, 2^11021110021 is an apocalyptic number.

It is an amenable number.

11021110021 is a deficient number, since it is larger than the sum of its proper divisors (164785643).

11021110021 is a wasteful number, since it uses less digits than its factorization.

11021110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11021110021 its reverse (12001112011), we get a palindrome (23022222032).

The spelling of 11021110021 in words is "eleven billion, twenty-one million, one hundred ten thousand, twenty-one".