122011221011221 has 4 divisors (see below), whose sum is σ = 122011257606700. Its totient is φ = 122011184415744.

The previous prime is 122011221011209. The next prime is 122011221011249. The reversal of 122011221011221 is 122110122110221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12513099712996 + 109498121298225 = 3537386^2 + 10464135^2 .

It is a cyclic number.

It is not a de Polignac number, because 122011221011221 - 2⁷ = 122011221011093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122011221011021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12732426 + ... + 20152843.

It is an arithmetic number, because the mean of its divisors is an integer number (30502814401675).

Almost surely, 2^{122011221011221} is an apocalyptic number.

It is an amenable number.

122011221011221 is a deficient number, since it is larger than the sum of its proper divisors (36595479).

122011221011221 is an equidigital number, since it uses as much as digits as its factorization.

122011221011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36595478.

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

Adding to 122011221011221 its reverse (122110122110221), we get a palindrome (244121343121442).

The spelling of 122011221011221 in words is "one hundred twenty-two trillion, eleven billion, two hundred twenty-one million, eleven thousand, two hundred twenty-one".