11020121010121 has 4 divisors (see below), whose sum is σ = 11020671458244. Its totient is φ = 11019570562000.

The previous prime is 11020121010109. The next prime is 11020121010169. The reversal of 11020121010121 is 12101012102011.

It is a happy number.

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 895983406096 + 10124137604025 = 946564^2 + 3181845^2 .

It is a cyclic number.

It is not a de Polignac number, because 11020121010121 - 2²³ = 11020112621513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11020121010421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275194030 + ... + 275234071.

It is an arithmetic number, because the mean of its divisors is an integer number (2755167864561).

Almost surely, 2^{11020121010121} is an apocalyptic number.

It is an amenable number.

11020121010121 is a deficient number, since it is larger than the sum of its proper divisors (550448123).

11020121010121 is an equidigital number, since it uses as much as digits as its factorization.

11020121010121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550448122.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11020121010121 its reverse (12101012102011), we get a palindrome (23121133112132).

The spelling of 11020121010121 in words is "eleven trillion, twenty billion, one hundred twenty-one million, ten thousand, one hundred twenty-one".