122205421 has 6 divisors (see below), whose sum is σ = 132329130. Its totient is φ = 112804848.

The previous prime is 122205389. The next prime is 122205427. The reversal of 122205421 is 124502221.

It can be written as a sum of positive squares in 3 ways, for example, as 6320196 + 115885225 = 2514^2 + 10765^2 .

It is not a de Polignac number, because 122205421 - 2⁵ = 122205389 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 (122205427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 361386 + ... + 361723.

It is an arithmetic number, because the mean of its divisors is an integer number (22054855).

Almost surely, 2^122205421 is an apocalyptic number.

It is an amenable number.

122205421 is a deficient number, since it is larger than the sum of its proper divisors (10123709).

122205421 is an equidigital number, since it uses as much as digits as its factorization.

122205421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723135 (or 723122 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 122205421 is about 11054.6560778705. The cubic root of 122205421 is about 496.2457768338.

Adding to 122205421 its reverse (124502221), we get a palindrome (246707642).

The spelling of 122205421 in words is "one hundred twenty-two million, two hundred five thousand, four hundred twenty-one".