11021002020121 has 4 divisors (see below), whose sum is σ = 11023844686372. Its totient is φ = 11018159353872.

The previous prime is 11021002020113. The next prime is 11021002020167. The reversal of 11021002020121 is 12102020012011.

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 4714374330121 + 6306627690000 = 2171261^2 + 2511300^2 .

It is a cyclic number.

It is not a de Polignac number, because 11021002020121 - 2³ = 11021002020113 is a prime.

It is a super-2 number, since 2×11021002020121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11021002020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1421327310 + ... + 1421335063.

It is an arithmetic number, because the mean of its divisors is an integer number (2755961171593).

Almost surely, 2^{11021002020121} is an apocalyptic number.

It is an amenable number.

11021002020121 is a deficient number, since it is larger than the sum of its proper divisors (2842666251).

11021002020121 is an equidigital number, since it uses as much as digits as its factorization.

11021002020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2842666250.

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

Adding to 11021002020121 its reverse (12102020012011), we get a palindrome (23123022032132).

The spelling of 11021002020121 in words is "eleven trillion, twenty-one billion, two million, twenty thousand, one hundred twenty-one".