221222100202 has 4 divisors (see below), whose sum is σ = 331833150306. Its totient is φ = 110611050100.

The previous prime is 221222100173. The next prime is 221222100299. The reversal of 221222100202 is 202001222122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 139293914841 + 81928185361 = 373221^2 + 286231^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55305525049 + ... + 55305525052.

Almost surely, 2^221222100202 is an apocalyptic number.

221222100202 is a deficient number, since it is larger than the sum of its proper divisors (110611050104).

221222100202 is a wasteful number, since it uses less digits than its factorization.

221222100202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110611050103.

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

Adding to 221222100202 its reverse (202001222122), we get a palindrome (423223322324).

The spelling of 221222100202 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred thousand, two hundred two".