221211020111112 has 256 divisors, whose sum is σ = 648190340928000. Its totient is φ = 69805072512000.

The previous prime is 221211020111069. The next prime is 221211020111117. The reversal of 221211020111112 is 211111020112122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (221211020111117) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 63467062 + ... + 66861722.

It is an arithmetic number, because the mean of its divisors is an integer number (2531993519250).

Almost surely, 2^{221211020111112} 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 221211020111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324095170464000).

221211020111112 is an abundant number, since it is smaller than the sum of its proper divisors (426979320816888).

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

221211020111112 is a wasteful number, since it uses less digits than its factorization.

221211020111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394909 (or 3394899 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221211020111112 its reverse (211111020112122), we get a palindrome (432322040223234).

The spelling of 221211020111112 in words is "two hundred twenty-one trillion, two hundred eleven billion, twenty million, one hundred eleven thousand, one hundred twelve".