121222210 has 8 divisors (see below), whose sum is σ = 218199996. Its totient is φ = 48488880.

The previous prime is 121222193. The next prime is 121222237. The reversal of 121222210 is 12222121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 118135161 + 3087049 = 10869^2 + 1757^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 6061101 + ... + 6061120.

Almost surely, 2^121222210 is an apocalyptic number.

121222210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121222210 is a deficient number, since it is larger than the sum of its proper divisors (96977786).

121222210 is a wasteful number, since it uses less digits than its factorization.

121222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122228.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 121222210 is about 11010.0958215630. The cubic root of 121222210 is about 494.9113333006.

Adding to 121222210 its reverse (12222121), we get a palindrome (133444331).

The spelling of 121222210 in words is "one hundred twenty-one million, two hundred twenty-two thousand, two hundred ten".