11011021220121 has 8 divisors (see below), whose sum is σ = 15810697136640. Its totient is φ = 6776013058512.

The previous prime is 11011021219999. The next prime is 11011021220137. The reversal of 11011021220121 is 12102212011011.

It is a happy number.

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

It is not a de Polignac number, because 11011021220121 - 2¹¹ = 11011021218073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11011021220121.

It is not an unprimeable number, because it can be changed into a prime (11011021220321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141166938681 + ... + 141166938758.

It is an arithmetic number, because the mean of its divisors is an integer number (1976337142080).

Almost surely, 2^{11011021220121} is an apocalyptic number.

It is an amenable number.

11011021220121 is a deficient number, since it is larger than the sum of its proper divisors (4799675916519).

11011021220121 is a wasteful number, since it uses less digits than its factorization.

11011021220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282333877455.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11011021220121 its reverse (12102212011011), we get a palindrome (23113233231132).

The spelling of 11011021220121 in words is "eleven trillion, eleven billion, twenty-one million, two hundred twenty thousand, one hundred twenty-one".