121312222 has 8 divisors (see below), whose sum is σ = 182094696. Its totient is φ = 60613992.

The previous prime is 121312199. The next prime is 121312229. The reversal of 121312222 is 222213121.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 121312196 and 121312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121312229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17328 + ... + 23299.

It is an arithmetic number, because the mean of its divisors is an integer number (22761837).

Almost surely, 2^121312222 is an apocalyptic number.

121312222 is a deficient number, since it is larger than the sum of its proper divisors (60782474).

121312222 is a wasteful number, since it uses less digits than its factorization.

121312222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42122.

The product of its digits is 96, while the sum is 16.

The square root of 121312222 is about 11014.1827658706. The cubic root of 121312222 is about 495.0337996850.

Adding to 121312222 its reverse (222213121), we get a palindrome (343525343).

The spelling of 121312222 in words is "one hundred twenty-one million, three hundred twelve thousand, two hundred twenty-two".