121222404 has 36 divisors (see below), whose sum is σ = 313900860. Its totient is φ = 39421440.

The previous prime is 121222399. The next prime is 121222417. The reversal of 121222404 is 404222121.

It can be written as a sum of positive squares in 2 ways, for example, as 5616900 + 115605504 = 2370^2 + 10752^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39589 + ... + 42540.

Almost surely, 2^121222404 is an apocalyptic number.

It is an amenable number.

121222404 is an abundant number, since it is smaller than the sum of its proper divisors (192678456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121222404 is a wasteful number, since it uses less digits than its factorization.

121222404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82180 (or 82175 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 121222404 is about 11010.1046316554. The cubic root of 121222404 is about 494.9115973137.

Adding to 121222404 its reverse (404222121), we get a palindrome (525444525).

The spelling of 121222404 in words is "one hundred twenty-one million, two hundred twenty-two thousand, four hundred four".