11020001021 has 4 divisors (see below), whose sum is σ = 11129110044. Its totient is φ = 10910892000.

The previous prime is 11020000997. The next prime is 11020001053. The reversal of 11020001021 is 12010002011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6274857796 + 4745143225 = 79214^2 + 68885^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020001021 - 2¹⁰ = 11019999997 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 (11020001221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54554360 + ... + 54554561.

It is an arithmetic number, because the mean of its divisors is an integer number (2782277511).

Almost surely, 2^11020001021 is an apocalyptic number.

It is an amenable number.

11020001021 is a deficient number, since it is larger than the sum of its proper divisors (109109023).

11020001021 is a wasteful number, since it uses less digits than its factorization.

11020001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109109022.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 11020001021 its reverse (12010002011), we get a palindrome (23030003032).

The spelling of 11020001021 in words is "eleven billion, twenty million, one thousand, twenty-one".