121002220218 has 32 divisors (see below), whose sum is σ = 265256082432. Its totient is φ = 36493556400.

The previous prime is 121002220217. The next prime is 121002220247. The reversal of 121002220218 is 812022200121.

It is a junction number, because it is equal to n+sod(n) for n = 121002220194 and 121002220203.

It is not an unprimeable number, because it can be changed into a prime (121002220217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4330546 + ... + 4358397.

It is an arithmetic number, because the mean of its divisors is an integer number (8289252576).

Almost surely, 2^121002220218 is an apocalyptic number.

121002220218 is an abundant number, since it is smaller than the sum of its proper divisors (144253862214).

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

121002220218 is a wasteful number, since it uses less digits than its factorization.

121002220218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8689170.

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

Adding to 121002220218 its reverse (812022200121), we get a palindrome (933024420339).

The spelling of 121002220218 in words is "one hundred twenty-one billion, two million, two hundred twenty thousand, two hundred eighteen".