11001122022121 has 40 divisors (see below), whose sum is σ = 14014368784800. Its totient is φ = 8563869457920.

The previous prime is 11001122022113. The next prime is 11001122022181. The reversal of 11001122022121 is 12122022110011.

It is not a de Polignac number, because 11001122022121 - 2³ = 11001122022113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001122022095 and 11001122022104.

It is not an unprimeable number, because it can be changed into a prime (11001122022101) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 26708425 + ... + 27117193.

It is an arithmetic number, because the mean of its divisors is an integer number (350359219620).

Almost surely, 2^{11001122022121} is an apocalyptic number.

11001122022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11001122022121 is a deficient number, since it is larger than the sum of its proper divisors (3013246762679).

11001122022121 is an equidigital number, since it uses as much as digits as its factorization.

11001122022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409827 (or 409806 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11001122022121 its reverse (12122022110011), we get a palindrome (23123144132132).

The spelling of 11001122022121 in words is "eleven trillion, one billion, one hundred twenty-two million, twenty-two thousand, one hundred twenty-one".