11202020021221 has 8 divisors (see below), whose sum is σ = 11259100648224. Its totient is φ = 11144941592400.

The previous prime is 11202020021189. The next prime is 11202020021321. The reversal of 11202020021221 is 12212002020211.

It is a happy number.

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 11202020021221 - 2⁵ = 11202020021189 is a prime.

It is a super-2 number, since 2×11202020021221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11202020021195 and 11202020021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202020021321) 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, 10203046 + ... + 11247496.

It is an arithmetic number, because the mean of its divisors is an integer number (1407387581028).

Almost surely, 2^{11202020021221} is an apocalyptic number.

It is an amenable number.

11202020021221 is a deficient number, since it is larger than the sum of its proper divisors (57080627003).

11202020021221 is a wasteful number, since it uses less digits than its factorization.

11202020021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099091.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11202020021221 its reverse (12212002020211), we get a palindrome (23414022041432).

The spelling of 11202020021221 in words is "eleven trillion, two hundred two billion, twenty million, twenty-one thousand, two hundred twenty-one".