11221001201021 has 16 divisors (see below), whose sum is σ = 11515858473600. Its totient is φ = 10929798953280.

The previous prime is 11221001201017. The next prime is 11221001201083. The reversal of 11221001201021 is 12010210012211.

It is a cyclic number.

It is not a de Polignac number, because 11221001201021 - 2² = 11221001201017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11221001200987 and 11221001201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221001203021) 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, 17151680 + ... + 17793878.

It is an arithmetic number, because the mean of its divisors is an integer number (719741154600).

Almost surely, 2^{11221001201021} is an apocalyptic number.

It is an amenable number.

11221001201021 is a deficient number, since it is larger than the sum of its proper divisors (294857272579).

11221001201021 is a wasteful number, since it uses less digits than its factorization.

11221001201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645044.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11221001201021 its reverse (12010210012211), we get a palindrome (23231211213232).

The spelling of 11221001201021 in words is "eleven trillion, two hundred twenty-one billion, one million, two hundred one thousand, twenty-one".