221222120002 has 8 divisors (see below), whose sum is σ = 357358809276. Its totient is φ = 102102516912.

The previous prime is 221222119981. The next prime is 221222120003. The reversal of 221222120002 is 200021222122.

It can be written as a sum of positive squares in 2 ways, for example, as 190112568361 + 31109551641 = 436019^2 + 176379^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (221222120003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4254271513 + ... + 4254271564.

Almost surely, 2^221222120002 is an apocalyptic number.

221222120002 is a deficient number, since it is larger than the sum of its proper divisors (136136689274).

221222120002 is a wasteful number, since it uses less digits than its factorization.

221222120002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8508543092.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 221222120002 its reverse (200021222122), we get a palindrome (421243342124).

The spelling of 221222120002 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty thousand, two".