221201012211220 has 96 divisors (see below), whose sum is σ = 465844867488000. Its totient is φ = 88228912794624.

The previous prime is 221201012211217. The next prime is 221201012211239. The reversal of 221201012211220 is 22112210102122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57499611337 + ... + 57499615183.

It is an arithmetic number, because the mean of its divisors is an integer number (4852550703000).

Almost surely, 2^{221201012211220} is an apocalyptic number.

221201012211220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221201012211220 is an abundant number, since it is smaller than the sum of its proper divisors (244643855276780).

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

221201012211220 is a wasteful number, since it uses less digits than its factorization.

221201012211220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9377 (or 9375 counting only the distinct ones).

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

Adding to 221201012211220 its reverse (22112210102122), we get a palindrome (243313222313342).

The spelling of 221201012211220 in words is "two hundred twenty-one trillion, two hundred one billion, twelve million, two hundred eleven thousand, two hundred twenty".