121222222 has 8 divisors (see below), whose sum is σ = 198363672. Its totient is φ = 55101000.

The previous prime is 121222193. The next prime is 121222237. The reversal of 121222222 is 222222121.

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

It is a nude number because it is divisible by every one of its digits.

121222222 is a modest number, since divided by 22222 gives 1212 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 121222196 and 121222205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2755029 + ... + 2755072.

It is an arithmetic number, because the mean of its divisors is an integer number (24795459).

Almost surely, 2^121222222 is an apocalyptic number.

121222222 is a deficient number, since it is larger than the sum of its proper divisors (77141450).

121222222 is a wasteful number, since it uses less digits than its factorization.

121222222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510114.

The product of its digits is 128, while the sum is 16.

The square root of 121222222 is about 11010.0963665174. The cubic root of 121222222 is about 494.9113496313.

Adding to 121222222 its reverse (222222121), we get a palindrome (343444343).

It can be divided in two parts, 121 and 222222, that multiplied together give a palindrome (26888862).

The spelling of 121222222 in words is "one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".