221210021222112 has 384 divisors, whose sum is σ = 665433750030336. Its totient is φ = 63741743235072.

The previous prime is 221210021222093. The next prime is 221210021222137. The reversal of 221210021222112 is 211222120012122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3997045513 + ... + 3997100855.

It is an arithmetic number, because the mean of its divisors is an integer number (1732900390704).

Almost surely, 2^{221210021222112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221210021222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332716875015168).

221210021222112 is an abundant number, since it is smaller than the sum of its proper divisors (444223728808224).

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

221210021222112 is a wasteful number, since it uses less digits than its factorization.

221210021222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56322 (or 56314 counting only the distinct ones).

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

Adding to 221210021222112 its reverse (211222120012122), we get a palindrome (432432141234234).

The spelling of 221210021222112 in words is "two hundred twenty-one trillion, two hundred ten billion, twenty-one million, two hundred twenty-two thousand, one hundred twelve".