11021220101021 has 16 divisors (see below), whose sum is σ = 12479565683760. Its totient is φ = 9661599198720.

The previous prime is 11021220100981. The next prime is 11021220101197. The reversal of 11021220101021 is 12010102212011.

11021220101021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 4293867787225 + 6727352313796 = 2072165^2 + 2593714^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021220101021 - 2¹⁰ = 11021220099997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11021220100987 and 11021220101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021220109021) 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, 239600000 + ... + 239645993.

It is an arithmetic number, because the mean of its divisors is an integer number (779972855235).

Almost surely, 2^{11021220101021} is an apocalyptic number.

It is an amenable number.

11021220101021 is a deficient number, since it is larger than the sum of its proper divisors (1458345582739).

11021220101021 is a wasteful number, since it uses less digits than its factorization.

11021220101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479246096.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11021220101021 its reverse (12010102212011), we get a palindrome (23031322313032).

The spelling of 11021220101021 in words is "eleven trillion, twenty-one billion, two hundred twenty million, one hundred one thousand, twenty-one".