122646221 has 4 divisors (see below), whose sum is σ = 123469500. Its totient is φ = 121822944.

The previous prime is 122646203. The next prime is 122646239.

122646221 is nontrivially palindromic in base 10.

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

It is an interprime number because it is at equal distance from previous prime (122646203) and next prime (122646239).

It can be written as a sum of positive squares in 2 ways, for example, as 4141225 + 118504996 = 2035^2 + 10886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122646221 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 (122646241) 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, 411416 + ... + 411713.

It is an arithmetic number, because the mean of its divisors is an integer number (30867375).

Almost surely, 2^122646221 is an apocalyptic number.

It is an amenable number.

122646221 is a deficient number, since it is larger than the sum of its proper divisors (823279).

122646221 is an equidigital number, since it uses as much as digits as its factorization.

122646221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823278.

The product of its digits is 2304, while the sum is 26.

The square root of 122646221 is about 11074.5754320425. The cubic root of 122646221 is about 496.8417205458.

The spelling of 122646221 in words is "one hundred twenty-two million, six hundred forty-six thousand, two hundred twenty-one".