11121020121 has 8 divisors (see below), whose sum is σ = 14934703840. Its totient is φ = 7360674912.

The previous prime is 11121020089. The next prime is 11121020143. The reversal of 11121020121 is 12102012111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11121020121 - 2⁵ = 11121020089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121020097 and 11121020106.

It is not an unprimeable number, because it can be changed into a prime (11121020171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13334140 + ... + 13334973.

It is an arithmetic number, because the mean of its divisors is an integer number (1866837980).

Almost surely, 2^11121020121 is an apocalyptic number.

It is an amenable number.

11121020121 is a deficient number, since it is larger than the sum of its proper divisors (3813683719).

11121020121 is a wasteful number, since it uses less digits than its factorization.

11121020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26669255.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 11121020121 its reverse (12102012111), we get a palindrome (23223032232).

It can be divided in two parts, 11 and 121020121, that multiplied together give a palindrome (1331221331).

The spelling of 11121020121 in words is "eleven billion, one hundred twenty-one million, twenty thousand, one hundred twenty-one".