221222220102 has 48 divisors (see below), whose sum is σ = 516222317520. Its totient is φ = 68063478336.

The previous prime is 221222220101. The next prime is 221222220113. The reversal of 221222220102 is 201022222122.

221222220102 is a `hidden beast` number, since 221 + 222 + 220 + 1 + 0 + 2 = 666.

221222220102 is digitally balanced in base 2, 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 (221222220101) by changing a digit.

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, 4533349 + ... + 4581887.

It is an arithmetic number, because the mean of its divisors is an integer number (10754631615).

Almost surely, 2^221222220102 is an apocalyptic number.

221222220102 is an abundant number, since it is smaller than the sum of its proper divisors (295000097418).

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

221222220102 is a wasteful number, since it uses less digits than its factorization.

221222220102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68037 (or 68034 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221222220102 its reverse (201022222122), we get a palindrome (422244442224).

The spelling of 221222220102 in words is "two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, one hundred two".