11121101111021 has 4 divisors (see below), whose sum is σ = 12132110302944. Its totient is φ = 10110091919100.

The previous prime is 11121101110943. The next prime is 11121101111077. The reversal of 11121101111021 is 12011110112111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11121101111021 - 2¹⁴ = 11121101094637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11121101110987 and 11121101111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121103111021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505504595945 + ... + 505504595966.

It is an arithmetic number, because the mean of its divisors is an integer number (3033027575736).

Almost surely, 2^{11121101111021} is an apocalyptic number.

11121101111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11121101111021 is a deficient number, since it is larger than the sum of its proper divisors (1011009191923).

11121101111021 is a wasteful number, since it uses less digits than its factorization.

11121101111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011009191922.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 11121101111021 its reverse (12011110112111), we get a palindrome (23132211223132).

The spelling of 11121101111021 in words is "eleven trillion, one hundred twenty-one billion, one hundred one million, one hundred eleven thousand, twenty-one".