11021001201221 has 4 divisors (see below), whose sum is σ = 12022910401344. Its totient is φ = 10019092001100.

The previous prime is 11021001201209. The next prime is 11021001201293. The reversal of 11021001201221 is 12210210012011.

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 a cyclic number.

It is not a de Polignac number, because 11021001201221 - 2¹⁰ = 11021001200197 is a prime.

It is a super-4 number, since 4×11021001201221⁴ (a number of 53 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11021001201196 and 11021001201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021001201121) 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, 500954600045 + ... + 500954600066.

It is an arithmetic number, because the mean of its divisors is an integer number (3005727600336).

Almost surely, 2^{11021001201221} is an apocalyptic number.

11021001201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11021001201221 is a deficient number, since it is larger than the sum of its proper divisors (1001909200123).

11021001201221 is a wasteful number, since it uses less digits than its factorization.

11021001201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001909200122.

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

Adding to 11021001201221 its reverse (12210210012011), we get a palindrome (23231211213232).

The spelling of 11021001201221 in words is "eleven trillion, twenty-one billion, one million, two hundred one thousand, two hundred twenty-one".