11020100021221 has 4 divisors (see below), whose sum is σ = 11020217461344. Its totient is φ = 11019982581100.

The previous prime is 11020100021219. The next prime is 11020100021237. The reversal of 11020100021221 is 12212000102011.

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 11020100021221 - 2¹ = 11020100021219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020100021621) 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, 58579195 + ... + 58767016.

It is an arithmetic number, because the mean of its divisors is an integer number (2755054365336).

Almost surely, 2^{11020100021221} is an apocalyptic number.

It is an amenable number.

11020100021221 is a deficient number, since it is larger than the sum of its proper divisors (117440123).

11020100021221 is an equidigital number, since it uses as much as digits as its factorization.

11020100021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117440122.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11020100021221 its reverse (12212000102011), we get a palindrome (23232100123232).

The spelling of 11020100021221 in words is "eleven trillion, twenty billion, one hundred million, twenty-one thousand, two hundred twenty-one".