121212211002222 has 16 divisors (see below), whose sum is σ = 242429140609920. Its totient is φ = 40403283899832.

The previous prime is 121212211002221. The next prime is 121212211002241. The reversal of 121212211002222 is 222200112212121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121212211002221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196274572 + ... + 196891167.

It is an arithmetic number, because the mean of its divisors is an integer number (15151821288120).

Almost surely, 2^{121212211002222} is an apocalyptic number.

121212211002222 is an abundant number, since it is smaller than the sum of its proper divisors (121216929607698).

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

121212211002222 is a wasteful number, since it uses less digits than its factorization.

121212211002222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393217127.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 121212211002222 its reverse (222200112212121), we get a palindrome (343412323214343).

The spelling of 121212211002222 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred eleven million, two thousand, two hundred twenty-two".