122220443421 has 24 divisors (see below), whose sum is σ = 182662760280. Its totient is φ = 78655764096.

The previous prime is 122220443417. The next prime is 122220443431. The reversal of 122220443421 is 124344022221.

It is a happy number.

122220443421 is a `hidden beast` number, since 1 + 2 + 2 + 2 + 204 + 434 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 3722708196 + 118497735225 = 61014^2 + 344235^2 .

It is not a de Polignac number, because 122220443421 - 2² = 122220443417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122220443431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1434015 + ... + 1516851.

It is an arithmetic number, because the mean of its divisors is an integer number (7610948345).

Almost surely, 2^122220443421 is an apocalyptic number.

It is an amenable number.

122220443421 is a deficient number, since it is larger than the sum of its proper divisors (60442316859).

122220443421 is a wasteful number, since it uses less digits than its factorization.

122220443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88525 (or 88522 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 122220443421 its reverse (124344022221), we get a palindrome (246564465642).

It can be divided in two parts, 1222204 and 43421, that added together give a square (1265625 = 1125²).

The spelling of 122220443421 in words is "one hundred twenty-two billion, two hundred twenty million, four hundred forty-three thousand, four hundred twenty-one".