11022111221 has 24 divisors (see below), whose sum is σ = 12876494400. Its totient is φ = 9350475200.

The previous prime is 11022111209. The next prime is 11022111227. The reversal of 11022111221 is 12211122011.

It is not a de Polignac number, because 11022111221 - 2¹⁸ = 11021849077 is a prime.

It is a super-2 number, since 2×11022111221² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11022111196 and 11022111205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022111227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215480 + ... + 261678.

It is an arithmetic number, because the mean of its divisors is an integer number (536520600).

Almost surely, 2^11022111221 is an apocalyptic number.

11022111221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11022111221 is a deficient number, since it is larger than the sum of its proper divisors (1854383179).

11022111221 is a wasteful number, since it uses less digits than its factorization.

11022111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46297 (or 46274 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11022111221 its reverse (12211122011), we get a palindrome (23233233232).

The spelling of 11022111221 in words is "eleven billion, twenty-two million, one hundred eleven thousand, two hundred twenty-one".