21221201122 has 8 divisors (see below), whose sum is σ = 34725601872. Its totient is φ = 9646000500.

The previous prime is 21221201117. The next prime is 21221201129. The reversal of 21221201122 is 22110212212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21221201096 and 21221201105.

It is not an unprimeable number, because it can be changed into a prime (21221201129) 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 3 ways as a sum of consecutive naturals, for example, 482300004 + ... + 482300047.

It is an arithmetic number, because the mean of its divisors is an integer number (4340700234).

Almost surely, 2^21221201122 is an apocalyptic number.

21221201122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21221201122 is a deficient number, since it is larger than the sum of its proper divisors (13504400750).

21221201122 is a wasteful number, since it uses less digits than its factorization.

21221201122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964600064.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21221201122 its reverse (22110212212), we get a palindrome (43331413334).

The spelling of 21221201122 in words is "twenty-one billion, two hundred twenty-one million, two hundred one thousand, one hundred twenty-two".