121212221122 has 8 divisors (see below), whose sum is σ = 184379153472. Its totient is φ = 59752503300.

The previous prime is 121212221113. The next prime is 121212221129. The reversal of 121212221122 is 221122212121.

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.

It is a self number, because there is not a number n which added to its sum of digits gives 121212221122.

It is not an unprimeable number, because it can be changed into a prime (121212221129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426803454 + ... + 426803737.

It is an arithmetic number, because the mean of its divisors is an integer number (23047394184).

Almost surely, 2^121212221122 is an apocalyptic number.

121212221122 is a deficient number, since it is larger than the sum of its proper divisors (63166932350).

121212221122 is an equidigital number, since it uses as much as digits as its factorization.

121212221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853607264.

The product of its digits is 128, while the sum is 19.

Adding to 121212221122 its reverse (221122212121), we get a palindrome (342334433243).

Subtracting 121212221122 from its reverse (221122212121), we obtain a palindrome (99909990999).

The spelling of 121212221122 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-two".