221002220211002 has 4 divisors (see below), whose sum is σ = 331503330316506. Its totient is φ = 110501110105500.

The previous prime is 221002220210939. The next prime is 221002220211011. The reversal of 221002220211002 is 200112022200122.

It is a happy number.

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., 134473918571521 + 86528301639481 = 11596289^2 + 9302059^2 .

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, 55250555052749 + ... + 55250555052752.

Almost surely, 2^{221002220211002} is an apocalyptic number.

221002220211002 is a deficient number, since it is larger than the sum of its proper divisors (110501110105504).

221002220211002 is a wasteful number, since it uses less digits than its factorization.

221002220211002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110501110105503.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 221002220211002 its reverse (200112022200122), we get a palindrome (421114242411124).

The spelling of 221002220211002 in words is "two hundred twenty-one trillion, two billion, two hundred twenty million, two hundred eleven thousand, two".