11011211200021 has 16 divisors (see below), whose sum is σ = 11477416624128. Its totient is φ = 10551955345200.

The previous prime is 11011211200009. The next prime is 11011211200063. The reversal of 11011211200021 is 12000211211011.

It is a happy number.

It is not a de Polignac number, because 11011211200021 - 2⁹ = 11011211199509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011211199974 and 11011211200010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011211200321) 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, 62402100 + ... + 62578306.

It is an arithmetic number, because the mean of its divisors is an integer number (717338539008).

Almost surely, 2^{11011211200021} is an apocalyptic number.

It is an amenable number.

11011211200021 is a deficient number, since it is larger than the sum of its proper divisors (466205424107).

11011211200021 is a wasteful number, since it uses less digits than its factorization.

11011211200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195912.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11011211200021 its reverse (12000211211011), we get a palindrome (23011422411032).

The spelling of 11011211200021 in words is "eleven trillion, eleven billion, two hundred eleven million, two hundred thousand, twenty-one".