122222000221 has 4 divisors (see below), whose sum is σ = 122237825472. Its totient is φ = 122206174972.

The previous prime is 122222000203. The next prime is 122222000227. The reversal of 122222000221 is 122000222221.

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: 122000222221 = 95597 ⋅1276193.

It is a cyclic number.

It is not a de Polignac number, because 122222000221 - 2²³ = 122213611613 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122222000195 and 122222000204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122222000227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7901035 + ... + 7916488.

It is an arithmetic number, because the mean of its divisors is an integer number (30559456368).

Almost surely, 2^122222000221 is an apocalyptic number.

It is an amenable number.

122222000221 is a deficient number, since it is larger than the sum of its proper divisors (15825251).

122222000221 is an equidigital number, since it uses as much as digits as its factorization.

122222000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15825250.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 122222000221 its reverse (122000222221), we get a palindrome (244222222442).

It can be divided in two parts, 122222000 and 221, that added together give a palindrome (122222221).

The spelling of 122222000221 in words is "one hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one", and thus it is an aban number.