11322212121 has 36 divisors (see below), whose sum is σ = 18462130596. Its totient is φ = 6676464960.

The previous prime is 11322212101. The next prime is 11322212123. The reversal of 11322212121 is 12121222311.

11322212121 is a `hidden beast` number, since 11 + 322 + 212 + 121 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10737104400 + 585107721 = 103620^2 + 24189^2 .

It is not a de Polignac number, because 11322212121 - 2⁵ = 11322212089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11322212094 and 11322212103.

It is not an unprimeable number, because it can be changed into a prime (11322212123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 100206 + ... + 180791.

It is an arithmetic number, because the mean of its divisors is an integer number (512836961).

Almost surely, 2^11322212121 is an apocalyptic number.

11322212121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11322212121 is a deficient number, since it is larger than the sum of its proper divisors (7139918475).

11322212121 is a wasteful number, since it uses less digits than its factorization.

11322212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281062 (or 281048 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 11322212121 its reverse (12121222311), we get a palindrome (23443434432).

The spelling of 11322212121 in words is "eleven billion, three hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".