11011021120121 has 32 divisors (see below), whose sum is σ = 12769003036800. Its totient is φ = 9383892249600.

The previous prime is 11011021120109. The next prime is 11011021120157. The reversal of 11011021120121 is 12102112011011.

It is a de Polignac number, because none of the positive numbers 2^k-11011021120121 is a prime.

It is a super-2 number, since 2×11011021120121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11011021120096 and 11011021120105.

It is not an unprimeable number, because it can be changed into a prime (11011021120171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153859055 + ... + 153930603.

It is an arithmetic number, because the mean of its divisors is an integer number (399031344900).

Almost surely, 2^{11011021120121} is an apocalyptic number.

11011021120121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11011021120121 is a deficient number, since it is larger than the sum of its proper divisors (1757981916679).

11011021120121 is a wasteful number, since it uses less digits than its factorization.

11011021120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74825.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11011021120121 its reverse (12102112011011), we get a palindrome (23113133131132).

The spelling of 11011021120121 in words is "eleven trillion, eleven billion, twenty-one million, one hundred twenty thousand, one hundred twenty-one".