22221312102 has 96 divisors (see below), whose sum is σ = 56969456544. Its totient is φ = 6183014400.

The previous prime is 22221312059. The next prime is 22221312109. The reversal of 22221312102 is 20121312222.

22221312102 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221312109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57498 + ... + 218514.

It is an arithmetic number, because the mean of its divisors is an integer number (593431839).

Almost surely, 2^22221312102 is an apocalyptic number.

22221312102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221312102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28484728272).

22221312102 is an abundant number, since it is smaller than the sum of its proper divisors (34748144442).

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

22221312102 is a wasteful number, since it uses less digits than its factorization.

22221312102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161094 (or 161091 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22221312102 its reverse (20121312222), we get a palindrome (42342624324).

The spelling of 22221312102 in words is "twenty-two billion, two hundred twenty-one million, three hundred twelve thousand, one hundred two".