221111112120220 has 48 divisors (see below), whose sum is σ = 530809361026560. Its totient is φ = 75789139593024.

The previous prime is 221111112120187. The next prime is 221111112120259. The reversal of 221111112120220 is 22021211111122.

It is a happy number.

221111112120220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 211816674 + ... + 212857993.

It is an arithmetic number, because the mean of its divisors is an integer number (11058528354720).

Almost surely, 2^{221111112120220} is an apocalyptic number.

221111112120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221111112120220 is an abundant number, since it is smaller than the sum of its proper divisors (309698248906340).

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

221111112120220 is a wasteful number, since it uses less digits than its factorization.

221111112120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424678402 (or 424678400 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221111112120220 its reverse (22021211111122), we get a palindrome (243132323231342).

The spelling of 221111112120220 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty thousand, two hundred twenty".