221102120220212 has 96 divisors (see below), whose sum is σ = 483393342136320. Its totient is φ = 85967147877120.

The previous prime is 221102120219983. The next prime is 221102120220251. The reversal of 221102120220212 is 212022021201122.

221102120220212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221102120220212² (a number of 29 digits) contains 22 as substring.

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, 3353606864 + ... + 3353672792.

It is an arithmetic number, because the mean of its divisors is an integer number (5035347313920).

Almost surely, 2^{221102120220212} is an apocalyptic number.

221102120220212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221102120220212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241696671068160).

221102120220212 is an abundant number, since it is smaller than the sum of its proper divisors (262291221916108).

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

221102120220212 is a wasteful number, since it uses less digits than its factorization.

221102120220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88101 (or 88099 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221102120220212 its reverse (212022021201122), we get a palindrome (433124141421334).

The spelling of 221102120220212 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred twenty million, two hundred twenty thousand, two hundred twelve".