11211221221001 has 8 divisors (see below), whose sum is σ = 11472535166400. Its totient is φ = 10949933997072.

The previous prime is 11211221220971. The next prime is 11211221221051. The reversal of 11211221221001 is 10012212211211.

11211221221001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11211221221001 - 2⁶ = 11211221220937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211221221051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5830226 + ... + 7510923.

It is an arithmetic number, because the mean of its divisors is an integer number (1434066895800).

Almost surely, 2^{11211221221001} is an apocalyptic number.

It is an amenable number.

11211221221001 is a deficient number, since it is larger than the sum of its proper divisors (261313945399).

11211221221001 is a wasteful number, since it uses less digits than its factorization.

11211221221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13360735.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11211221221001 its reverse (10012212211211), we get a palindrome (21223433432212).

The spelling of 11211221221001 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, one".