11001101221021 has 4 divisors (see below), whose sum is σ = 11103915251232. Its totient is φ = 10898287190812.

The previous prime is 11001101221009. The next prime is 11001101221031. The reversal of 11001101221021 is 12012210110011.

It is a happy number.

11001101221021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11001101221021 - 2¹⁷ = 11001101089949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11001101220992 and 11001101221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001101221031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51407014945 + ... + 51407015158.

It is an arithmetic number, because the mean of its divisors is an integer number (2775978812808).

Almost surely, 2^{11001101221021} is an apocalyptic number.

It is an amenable number.

11001101221021 is a deficient number, since it is larger than the sum of its proper divisors (102814030211).

11001101221021 is a wasteful number, since it uses less digits than its factorization.

11001101221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102814030210.

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

Adding to 11001101221021 its reverse (12012210110011), we get a palindrome (23013311331032).

The spelling of 11001101221021 in words is "eleven trillion, one billion, one hundred one million, two hundred twenty-one thousand, twenty-one".