110221321212 has 84 divisors (see below), whose sum is σ = 289964636920. Its totient is φ = 36643132512.

The previous prime is 110221321201. The next prime is 110221321229. The reversal of 110221321212 is 212123122011.

110221321212 is a `hidden beast` number, since 110 + 2 + 21 + 321 + 212 = 666.

It is a super-2 number, since 2×110221321212² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1055298 + ... + 1155030.

Almost surely, 2^110221321212 is an apocalyptic number.

110221321212 is a gapful number since it is divisible by the number (12) 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 110221321212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144982318460).

110221321212 is an abundant number, since it is smaller than the sum of its proper divisors (179743315708).

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

110221321212 is an equidigital number, since it uses as much as digits as its factorization.

110221321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100134 (or 100117 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 110221321212 its reverse (212123122011), we get a palindrome (322344443223).

The spelling of 110221321212 in words is "one hundred ten billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred twelve".