11021122112221 has 12 divisors (see below), whose sum is σ = 11934342786432. Its totient is φ = 10173148863696.

The previous prime is 11021122112131. The next prime is 11021122112237. The reversal of 11021122112221 is 12221122112011.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11021122112221 is a prime.

It is a super-2 number, since 2×11021122112221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021122112321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8642260 + ... + 9835186.

It is an arithmetic number, because the mean of its divisors is an integer number (994528565536).

Almost surely, 2^{11021122112221} is an apocalyptic number.

It is an amenable number.

11021122112221 is a deficient number, since it is larger than the sum of its proper divisors (913220674211).

11021122112221 is a wasteful number, since it uses less digits than its factorization.

11021122112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247620 (or 1247607 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 11021122112221 its reverse (12221122112011), we get a palindrome (23242244224232).

The spelling of 11021122112221 in words is "eleven trillion, twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".