11100022121221 has 16 divisors (see below), whose sum is σ = 12286964909376. Its totient is φ = 9943668000000.

The previous prime is 11100022121207. The next prime is 11100022121231. The reversal of 11100022121221 is 12212122000111.

It is a cyclic number.

It is not a de Polignac number, because 11100022121221 - 2¹⁹ = 11100021596933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11100022121195 and 11100022121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11100022121231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23440980 + ... + 23909821.

It is an arithmetic number, because the mean of its divisors is an integer number (767935306836).

Almost surely, 2^{11100022121221} is an apocalyptic number.

11100022121221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11100022121221 is a deficient number, since it is larger than the sum of its proper divisors (1186942788155).

11100022121221 is a wasteful number, since it uses less digits than its factorization.

11100022121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47351124.

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

Adding to 11100022121221 its reverse (12212122000111), we get a palindrome (23312144121332).

The spelling of 11100022121221 in words is "eleven trillion, one hundred billion, twenty-two million, one hundred twenty-one thousand, two hundred twenty-one".