11121222111021 has 64 divisors (see below), whose sum is σ = 18803822284800. Its totient is φ = 6435831369600.

The previous prime is 11121222110983. The next prime is 11121222111101. The reversal of 11121222111021 is 12011122212111.

It is a happy number.

It is not a de Polignac number, because 11121222111021 - 2¹⁰ = 11121222109997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11121222110985 and 11121222111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121222113021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9143611 + ... + 10288248.

It is an arithmetic number, because the mean of its divisors is an integer number (293809723200).

Almost surely, 2^{11121222111021} is an apocalyptic number.

11121222111021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11121222111021 is a deficient number, since it is larger than the sum of its proper divisors (7682600173779).

11121222111021 is a wasteful number, since it uses less digits than its factorization.

11121222111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19431967 (or 19431961 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11121222111021 its reverse (12011122212111), we get a palindrome (23132344323132).

The spelling of 11121222111021 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, twenty-one".