122000001221 has 4 divisors (see below), whose sum is σ = 139428572832. Its totient is φ = 104571429612.

The previous prime is 122000001191. The next prime is 122000001329. The reversal of 122000001221 is 122100000221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122100000221 = 67 ⋅1822388063.

It is a cyclic number.

It is not a de Polignac number, because 122000001221 - 2¹⁸ = 121999739077 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 (122000001121) 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, 8714285795 + ... + 8714285808.

It is an arithmetic number, because the mean of its divisors is an integer number (34857143208).

Almost surely, 2^122000001221 is an apocalyptic number.

It is an amenable number.

122000001221 is a deficient number, since it is larger than the sum of its proper divisors (17428571611).

122000001221 is an equidigital number, since it uses as much as digits as its factorization.

122000001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17428571610.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 122000001221 its reverse (122100000221), we get a palindrome (244100001442).

The spelling of 122000001221 in words is "one hundred twenty-two billion, one thousand, two hundred twenty-one".