102221122212 has 72 divisors (see below), whose sum is σ = 282172074912. Its totient is φ = 30944275200.

The previous prime is 102221122189. The next prime is 102221122231. The reversal of 102221122212 is 212221122201.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 254787 + ... + 518997.

It is an arithmetic number, because the mean of its divisors is an integer number (3919056596).

Almost surely, 2^102221122212 is an apocalyptic number.

102221122212 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 102221122212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141086037456).

102221122212 is an abundant number, since it is smaller than the sum of its proper divisors (179950952700).

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

102221122212 is a wasteful number, since it uses less digits than its factorization.

102221122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265209 (or 265204 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 102221122212 its reverse (212221122201), we get a palindrome (314442244413).

The spelling of 102221122212 in words is "one hundred two billion, two hundred twenty-one million, one hundred twenty-two thousand, two hundred twelve".