11211021120221 has 8 divisors (see below), whose sum is σ = 12086718737184. Its totient is φ = 10337225128560.

The previous prime is 11211021120179. The next prime is 11211021120239. The reversal of 11211021120221 is 12202112011211.

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 11211021120221 - 2¹⁴ = 11211021103837 is a prime.

It is a super-3 number, since 3×11211021120221³ (a number of 40 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11211021120221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211021120241) 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 7 ways as a sum of consecutive naturals, for example, 475394075 + ... + 475417656.

It is an arithmetic number, because the mean of its divisors is an integer number (1510839842148).

Almost surely, 2^{11211021120221} is an apocalyptic number.

It is an amenable number.

11211021120221 is a deficient number, since it is larger than the sum of its proper divisors (875697616963).

11211021120221 is an equidigital number, since it uses as much as digits as its factorization.

11211021120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950812651.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11211021120221 its reverse (12202112011211), we get a palindrome (23413133131432).

The spelling of 11211021120221 in words is "eleven trillion, two hundred eleven billion, twenty-one million, one hundred twenty thousand, two hundred twenty-one".