221221011111110 has 8 divisors (see below), whose sum is σ = 398197820000016. Its totient is φ = 88488404444440.

The previous prime is 221221011111073. The next prime is 221221011111143. The reversal of 221221011111110 is 11111110122122.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11061050555546 + ... + 11061050555565.

It is an arithmetic number, because the mean of its divisors is an integer number (49774727500002).

Almost surely, 2^{221221011111110} is an apocalyptic number.

221221011111110 is a deficient number, since it is larger than the sum of its proper divisors (176976808888906).

221221011111110 is a wasteful number, since it uses less digits than its factorization.

221221011111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22122101111118.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 221221011111110 its reverse (11111110122122), we get a palindrome (232332121233232).

The spelling of 221221011111110 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, eleven million, one hundred eleven thousand, one hundred ten".