2221201218 has 32 divisors (see below), whose sum is σ = 4642365312. Its totient is φ = 707168000.

The previous prime is 2221201211. The next prime is 2221201253. The reversal of 2221201218 is 8121021222.

It is a junction number, because it is equal to n+sod(n) for n = 2221201194 and 2221201203.

It is not an unprimeable number, because it can be changed into a prime (2221201211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85258 + ... + 108218.

It is an arithmetic number, because the mean of its divisors is an integer number (145073916).

Almost surely, 2^2221201218 is an apocalyptic number.

2221201218 is an abundant number, since it is smaller than the sum of its proper divisors (2421164094).

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

2221201218 is a wasteful number, since it uses less digits than its factorization.

2221201218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23690.

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

The square root of 2221201218 is about 47129.6214497846. The cubic root of 2221201218 is about 1304.7559949544.

The spelling of 2221201218 in words is "two billion, two hundred twenty-one million, two hundred one thousand, two hundred eighteen".