122106221 has 4 divisors (see below), whose sum is σ = 122468892. Its totient is φ = 121743552.

The previous prime is 122106209. The next prime is 122106233. The reversal of 122106221 is 122601221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122601221 = 787 ⋅155783.

It is an interprime number because it is at equal distance from previous prime (122106209) and next prime (122106233).

It can be written as a sum of positive squares in 2 ways, for example, as 32330596 + 89775625 = 5686^2 + 9475^2 .

It is a cyclic number.

It is not a de Polignac number, because 122106221 - 2⁶ = 122106157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122106221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122106421) 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, 180830 + ... + 181503.

It is an arithmetic number, because the mean of its divisors is an integer number (30617223).

Almost surely, 2^122106221 is an apocalyptic number.

It is an amenable number.

122106221 is a deficient number, since it is larger than the sum of its proper divisors (362671).

122106221 is an equidigital number, since it uses as much as digits as its factorization.

122106221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362670.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 122106221 is about 11050.1683697580. The cubic root of 122106221 is about 496.1114649874. Note that the first 3 decimals are identical.

Adding to 122106221 its reverse (122601221), we get a palindrome (244707442).

The spelling of 122106221 in words is "one hundred twenty-two million, one hundred six thousand, two hundred twenty-one".