11211221301021 has 24 divisors (see below), whose sum is σ = 18507788881920. Its totient is φ = 6406282038816.

The previous prime is 11211221301013. The next prime is 11211221301041. The reversal of 11211221301021 is 12010312211211.

It is a happy number.

11211221301021 is a `hidden beast` number, since 1 + 121 + 1 + 221 + 301 + 0 + 21 = 666.

It is not a de Polignac number, because 11211221301021 - 2³ = 11211221301013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11211221300985 and 11211221301003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211221301011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1362451 + ... + 4927343.

It is an arithmetic number, because the mean of its divisors is an integer number (771157870080).

Almost surely, 2^{11211221301021} is an apocalyptic number.

It is an amenable number.

11211221301021 is a deficient number, since it is larger than the sum of its proper divisors (7296567580899).

11211221301021 is a wasteful number, since it uses less digits than its factorization.

11211221301021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614825 (or 3614822 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 11211221301021 its reverse (12010312211211), we get a palindrome (23221533512232).

The spelling of 11211221301021 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, three hundred one thousand, twenty-one".