122210122221 has 20 divisors (see below), whose sum is σ = 199157237664. Its totient is φ = 74066740200.

The previous prime is 122210122207. The next prime is 122210122253. The reversal of 122210122221 is 122221012221.

It is a happy number.

It is not a de Polignac number, because 122210122221 - 2³⁰ = 121136380397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122210122194 and 122210122203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122210122201) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 68579425 + ... + 68581206.

Almost surely, 2^122210122221 is an apocalyptic number.

122210122221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

122210122221 is a deficient number, since it is larger than the sum of its proper divisors (76947115443).

122210122221 is a wasteful number, since it uses less digits than its factorization.

122210122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137160654 (or 137160645 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 122210122221 its reverse (122221012221), we get a palindrome (244431134442).

Subtracting 122210122221 from its reverse (122221012221), we obtain a square (10890000 = 3300²).

The spelling of 122210122221 in words is "one hundred twenty-two billion, two hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".