11220021011221 has 32 divisors (see below), whose sum is σ = 12721918936320. Its totient is φ = 9801809740800.

The previous prime is 11220021011219. The next prime is 11220021011261. The reversal of 11220021011221 is 12211012002211.

It is not a de Polignac number, because 11220021011221 - 2¹ = 11220021011219 is a prime.

It is a super-2 number, since 2×11220021011221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11220021011195 and 11220021011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220021011261) 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 31 ways as a sum of consecutive naturals, for example, 137034331 + ... + 137116183.

It is an arithmetic number, because the mean of its divisors is an integer number (397559966760).

Almost surely, 2^{11220021011221} is an apocalyptic number.

11220021011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11220021011221 is a deficient number, since it is larger than the sum of its proper divisors (1501897925099).

11220021011221 is a wasteful number, since it uses less digits than its factorization.

11220021011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83917.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11220021011221 its reverse (12211012002211), we get a palindrome (23431033013432).

The spelling of 11220021011221 in words is "eleven trillion, two hundred twenty billion, twenty-one million, eleven thousand, two hundred twenty-one".