11021200012021 has 4 divisors (see below), whose sum is σ = 11021209500844. Its totient is φ = 11021190523200.

The previous prime is 11021200011947. The next prime is 11021200012027. The reversal of 11021200012021 is 12021000212011.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6361926665796 + 4659273346225 = 2522286^2 + 2158535^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021200012021 - 2⁷ = 11021200011893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021200011992 and 11021200012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021200012027) 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, 2711940 + ... + 5421901.

It is an arithmetic number, because the mean of its divisors is an integer number (2755302375211).

Almost surely, 2^{11021200012021} is an apocalyptic number.

It is an amenable number.

11021200012021 is a deficient number, since it is larger than the sum of its proper divisors (9488823).

11021200012021 is an equidigital number, since it uses as much as digits as its factorization.

11021200012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9488822.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11021200012021 its reverse (12021000212011), we get a palindrome (23042200224032).

The spelling of 11021200012021 in words is "eleven trillion, twenty-one billion, two hundred million, twelve thousand, twenty-one".