221001002222 has 48 divisors (see below), whose sum is σ = 447538545792. Its totient is φ = 79480870560.

The previous prime is 221001002203. The next prime is 221001002231. The reversal of 221001002222 is 222200100122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 221001002197 and 221001002206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4219748 + ... + 4271799.

It is an arithmetic number, because the mean of its divisors is an integer number (9323719704).

Almost surely, 2^221001002222 is an apocalyptic number.

221001002222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221001002222 is an abundant number, since it is smaller than the sum of its proper divisors (226537543570).

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

221001002222 is a wasteful number, since it uses less digits than its factorization.

221001002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8491593 (or 8491580 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 221001002222 its reverse (222200100122), we get a palindrome (443201102344).

The spelling of 221001002222 in words is "two hundred twenty-one billion, one million, two thousand, two hundred twenty-two".