221121011220112 has 20 divisors (see below), whose sum is σ = 428451663767040. Its totient is φ = 110552839925408.

The previous prime is 221121011220061. The next prime is 221121011220113. The reversal of 221121011220112 is 211022110121122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221121011220112.

It is not an unprimeable number, because it can be changed into a prime (221121011220113) 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, 478867312 + ... + 479328847.

It is an arithmetic number, because the mean of its divisors is an integer number (21422583188352).

Almost surely, 2^{221121011220112} is an apocalyptic number.

It is an amenable number.

221121011220112 is a deficient number, since it is larger than the sum of its proper divisors (207330652546928).

221121011220112 is a wasteful number, since it uses less digits than its factorization.

221121011220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958210590 (or 958210584 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 221121011220112 its reverse (211022110121122), we get a palindrome (432143121341234).

The spelling of 221121011220112 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, eleven million, two hundred twenty thousand, one hundred twelve".