11001122120021 has 16 divisors (see below), whose sum is σ = 12021304590720. Its totient is φ = 9984290742720.

The previous prime is 11001122119913. The next prime is 11001122120057. The reversal of 11001122120021 is 12002122110011.

It is a cyclic number.

It is not a de Polignac number, because 11001122120021 - 2¹⁸ = 11001121857877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001122119978 and 11001122120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001122120221) 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, 52395776 + ... + 52605318.

It is an arithmetic number, because the mean of its divisors is an integer number (751331536920).

Almost surely, 2^{11001122120021} is an apocalyptic number.

11001122120021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11001122120021 is a deficient number, since it is larger than the sum of its proper divisors (1020182470699).

11001122120021 is a wasteful number, since it uses less digits than its factorization.

11001122120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217516.

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

Adding to 11001122120021 its reverse (12002122110011), we get a palindrome (23003244230032).

The spelling of 11001122120021 in words is "eleven trillion, one billion, one hundred twenty-two million, one hundred twenty thousand, twenty-one".