11001222120021 has 32 divisors (see below), whose sum is σ = 16995852926208. Its totient is φ = 6199405217280.

The previous prime is 11001222120017. The next prime is 11001222120043. The reversal of 11001222120021 is 12002122210011.

11001222120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11001222120021 - 2² = 11001222120017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001222120121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10213591 + ... + 11239211.

It is an arithmetic number, because the mean of its divisors is an integer number (531120403944).

Almost surely, 2^{11001222120021} is an apocalyptic number.

It is an amenable number.

11001222120021 is a deficient number, since it is larger than the sum of its proper divisors (5994630806187).

11001222120021 is a wasteful number, since it uses less digits than its factorization.

11001222120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032701.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11001222120021 its reverse (12002122210011), we get a palindrome (23003344330032).

The spelling of 11001222120021 in words is "eleven trillion, one billion, two hundred twenty-two million, one hundred twenty thousand, twenty-one".