11001100122221 has 16 divisors (see below), whose sum is σ = 12421022668800. Its totient is φ = 9652850449200.

The previous prime is 11001100122211. The next prime is 11001100122239. The reversal of 11001100122221 is 12222100110011.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11001100122221 is a prime.

It is a super-2 number, since 2×11001100122221² (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 = 11001100122196 and 11001100122205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001100122211) 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, 42431831 + ... + 42690308.

It is an arithmetic number, because the mean of its divisors is an integer number (776313916800).

Almost surely, 2^{11001100122221} is an apocalyptic number.

11001100122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11001100122221 is a deficient number, since it is larger than the sum of its proper divisors (1419922546579).

11001100122221 is a wasteful number, since it uses less digits than its factorization.

11001100122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85122560.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11001100122221 its reverse (12222100110011), we get a palindrome (23223200232232).

The spelling of 11001100122221 in words is "eleven trillion, one billion, one hundred million, one hundred twenty-two thousand, two hundred twenty-one".