11022212121221 has 32 divisors (see below), whose sum is σ = 13252875288576. Its totient is φ = 8969604336000.

The previous prime is 11022212121209. The next prime is 11022212121257. The reversal of 11022212121221 is 12212121222011.

It is not a de Polignac number, because 11022212121221 - 2¹⁰ = 11022212120197 is a prime.

It is a super-2 number, since 2×11022212121221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11022212121193 and 11022212121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022212124221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1696556 + ... + 4992266.

It is an arithmetic number, because the mean of its divisors is an integer number (414152352768).

Almost surely, 2^{11022212121221} is an apocalyptic number.

It is an amenable number.

11022212121221 is a deficient number, since it is larger than the sum of its proper divisors (2230663167355).

11022212121221 is a wasteful number, since it uses less digits than its factorization.

11022212121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296073.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 11022212121221 its reverse (12212121222011), we get a palindrome (23234333343232).

The spelling of 11022212121221 in words is "eleven trillion, twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-one".