221202122001220 has 48 divisors (see below), whose sum is σ = 480815680923648. Its totient is φ = 85393312721280.

The previous prime is 221202122001139. The next prime is 221202122001253. The reversal of 221202122001220 is 22100221202122.

221202122001220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 485845507 + ... + 486300586.

It is an arithmetic number, because the mean of its divisors is an integer number (10016993352576).

Almost surely, 2^{221202122001220} is an apocalyptic number.

221202122001220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221202122001220 is an abundant number, since it is smaller than the sum of its proper divisors (259613558922428).

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

221202122001220 is a wasteful number, since it uses less digits than its factorization.

221202122001220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972146500 (or 972146498 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221202122001220 its reverse (22100221202122), we get a palindrome (243302343203342).

The spelling of 221202122001220 in words is "two hundred twenty-one trillion, two hundred two billion, one hundred twenty-two million, one thousand, two hundred twenty".