11020100021 has 16 divisors (see below), whose sum is σ = 13038589440. Its totient is φ = 9113153280.

The previous prime is 11020099991. The next prime is 11020100081. The reversal of 11020100021 is 12000102011.

It is not a de Polignac number, because 11020100021 - 2⁶ = 11020099957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11020099981 and 11020100008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020100081) 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, 256340 + ... + 296226.

It is an arithmetic number, because the mean of its divisors is an integer number (814911840).

Almost surely, 2^11020100021 is an apocalyptic number.

It is an amenable number.

11020100021 is a deficient number, since it is larger than the sum of its proper divisors (2018489419).

11020100021 is a wasteful number, since it uses less digits than its factorization.

11020100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41284.

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

Adding to 11020100021 its reverse (12000102011), we get a palindrome (23020202032).

The spelling of 11020100021 in words is "eleven billion, twenty million, one hundred thousand, twenty-one".