11021201021021 has 4 divisors (see below), whose sum is σ = 11669506963452. Its totient is φ = 10372895078592.

The previous prime is 11021201020943. The next prime is 11021201021063. The reversal of 11021201021021 is 12012010212011.

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 8882104641796 + 2139096379225 = 2980286^2 + 1462565^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021201021021 - 2¹⁸ = 11021200758877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021201020987 and 11021201021005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021201021071) 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, 324152971190 + ... + 324152971223.

It is an arithmetic number, because the mean of its divisors is an integer number (2917376740863).

Almost surely, 2^{11021201021021} is an apocalyptic number.

It is an amenable number.

11021201021021 is a deficient number, since it is larger than the sum of its proper divisors (648305942431).

11021201021021 is an equidigital number, since it uses as much as digits as its factorization.

11021201021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648305942430.

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

Adding to 11021201021021 its reverse (12012010212011), we get a palindrome (23033211233032).

The spelling of 11021201021021 in words is "eleven trillion, twenty-one billion, two hundred one million, twenty-one thousand, twenty-one".