221100221002 has 4 divisors (see below), whose sum is σ = 331650331506. Its totient is φ = 110550110500.

The previous prime is 221100220981. The next prime is 221100221021. The reversal of 221100221002 is 200122001122.

It is a happy number.

221100221002 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 114054122961 + 107046098041 = 337719^2 + 327179^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 55275055249 + ... + 55275055252.

Almost surely, 2^221100221002 is an apocalyptic number.

221100221002 is a deficient number, since it is larger than the sum of its proper divisors (110550110504).

221100221002 is a wasteful number, since it uses less digits than its factorization.

221100221002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110550110503.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221100221002 its reverse (200122001122), we get a palindrome (421222222124).

The spelling of 221100221002 in words is "two hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, two".